INVESTOR REGISTRATION RIGHTS AGREEMENT

      THIS  REGISTRATION  RIGHTS  AGREEMENT  (this  "Agreement"),  dated  as  of
December 30, 2005, by and among EARTHSHELL  CORPORATION,  a Delaware corporation
(the  "Company"),  and the undersigned  investors  listed on Schedule I attached
hereto (each, an "Investor" and collectively, the "Investors").

      WHEREAS:

      A. In connection with the Securities  Purchase  Agreement by and among the
parties hereto of even date herewith (the "Securities Purchase Agreement"),  the
Company  has  agreed,  upon the  terms  and  subject  to the  conditions  of the
Securities  Purchase  Agreement,  to  issue  and sell to the  Investors  secured
convertible debentures (the "Convertible Debentures") which shall be convertible
into that number of shares of the Company's  common stock,  par value $0.001 per
share (the "Common  Stock"),  pursuant to the terms of the  Securities  Purchase
Agreement  for an  aggregate  purchase  price of up to Four Million Five Hundred
Thousand Dollars  ($4,500,000).  Capitalized terms not defined herein shall have
the meaning ascribed to them in the Securities Purchase Agreement.

      B. To induce the Investors to execute and deliver the Securities  Purchase
Agreement,  the Company has agreed to provide certain  registration rights under
the  Securities  Act of 1933, as amended,  and the rules and  regulations  there
under, or any similar successor statute  (collectively,  the "Securities  Act"),
and applicable state securities laws.

      NOW, THEREFORE,  in consideration of the premises and the mutual covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency  of which are hereby  acknowledged,  the Company  and the  Investors
hereby agree as follows:

      1. DEFINITIONS.

      As used in this  Agreement,  the following  terms shall have the following
meanings:

            (a) "Person" means a corporation,  a limited liability  company,  an
association,  a partnership,  an  organization,  a business,  an  individual,  a
governmental or political subdivision thereof or a governmental agency.

            (b)  "Register,"   "registered,"  and  "registration"   refer  to  a
registration   effected  by  preparing  and  filing  one  or  more  Registration
Statements (as defined below) in compliance with the Securities Act and pursuant
to Rule 415  under  the  Securities  Act or any  successor  rule  providing  for
offering  securities  on a continuous  or delayed  basis ("Rule  415"),  and the
declaration or ordering of  effectiveness of such  Registration  Statement(s) by
the United States Securities and Exchange Commission (the "SEC").

            (c)  "Registrable  Securities"  means the  shares  of  Common  Stock
issuable  to  the  Investors  upon  conversion  of  the  Convertible  Debentures
including the shares of Common Stock listed on Exhibit I attached hereto.
<PAGE>

            (d)  "Registration  Statement" means a registration  statement under
the Securities Act which covers the Registrable Securities.

      2. REGISTRATION.

            (a)  Subject  to the terms and  conditions  of this  Agreement,  the
Company  shall  prepare  and file,  no later than thirty (30) days from the date
hereof (the "Scheduled Filing Deadline"),  with the SEC a registration statement
on Form S-1 or SB-2 (or, if the Company is then eligible, on Form S-3) under the
Securities  Act (the  "Initial  Registration  Statement")  for the resale by the
Investors  of  the   Registrable   Securities.   The  Company  shall  cause  the
Registration  Statement  to  remain  effective  until  all  of  the  Registrable
Securities  have been sold.  Prior to the filing of the  Registration  Statement
with the SEC,  the  Company  shall  furnish a copy of the  Initial  Registration
Statement to the  Investors for their review and comment.  The  Investors  shall
furnish  comments on the Initial  Registration  Statement to the Company  within
twenty-four (24) hours of the receipt thereof from the Company.

            (b) Effectiveness of the Initial Registration Statement. The Company
shall  use its best  efforts  (i) to have  the  Initial  Registration  Statement
declared  effective by the SEC by February 14, 2006,  but in no event later than
May 31, 2006 (the  "Scheduled  Effective  Deadline") and (ii) to insure that the
Initial Registration Statement and any subsequent Registration Statement remains
in effect until all of the Registrable Securities have been sold, subject to the
terms  and  conditions  of this  Agreement.  It shall  be an  event  of  default
hereunder if the Initial Registration Statement is not declared effective by the
SEC by June 30, 2006.

            (c)  Failure  to File or Obtain  Effectiveness  of the  Registration
Statement. In the event the Registration Statement is not filed by the Scheduled
Filing  Deadline  or is not  declared  effective  by the  SEC on or  before  the
Scheduled  Effective  Date,  or if after  the  Registration  Statement  has been
declared effective by the SEC, sales cannot be made pursuant to the Registration
Statement  (whether  because  of a failure  to keep the  Registration  Statement
effective,  failure to disclose such information as is necessary for sales to be
made  pursuant to the  Registration  Statement,  failure to register  sufficient
shares of Common Stock or otherwise)  then as partial  relief for the damages to
any holder of Registrable Securities by reason of any such delay in or reduction
of its ability to sell the underlying shares of Common Stock (which remedy shall
not be  exclusive of any other  remedies at law or in equity),  the Company will
pay as  liquidated  damages (the  "Liquidated  Damages")  to the holder,  at the
holder's  option,  either a cash amount or shares of the Company's  Common Stock
within three (3) business  days,  after demand  therefore,  equal to one percent
(1%) of the  liquidated  value  of the  Convertible  Debentures  outstanding  as
Liquidated  Damages for each thirty (30) day period after the  Scheduled  Filing
Deadline or the Scheduled Effective Date as the case may be.

            (d)  Liquidated  Damages.   The  Company  and  the  Investor  hereto
acknowledge  and agree that the sums payable under  subsection  2(c) above shall
constitute liquidated damages and not penalties and are in addition to all other
rights of the  Investor,  including  the right to call a  default.  The  parties
further acknowledge that (i) the amount of loss or damages likely to be incurred
is incapable or is difficult to precisely  estimate,  (ii) the amounts specified
in such  subsections  bear a reasonable  relationship to, and are not plainly or
grossly  disproportionate  to,  the  probable  loss  likely  to be  incurred  in
connection   with  any  failure  by  the  Company  to  obtain  or  maintain  the
effectiveness  of a  Registration  Statement,  (iii) one of the  reasons for the
Company  and the  Investor  reaching  an  agreement  as to such  amounts was the
uncertainty and cost of litigation regarding the question of actual damages, and
(iv) the Company and the Investor are  sophisticated  business  parties and have
been  represented by  sophisticated  and able legal counsel and negotiated  this
Agreement at arm's length.


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<PAGE>

      3. RELATED OBLIGATIONS.

            (a) The  Company  shall keep the  Registration  Statement  effective
pursuant  to Rule 415 at all times  until the date on which the  Investor  shall
have sold all the Registrable  Securities covered by such Registration Statement
(the  "Registration  Period"),   which  Registration  Statement  (including  any
amendments or supplements thereto and prospectuses  contained therein) shall not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated therein,  or necessary to make the statements  therein, in
light of the circumstances in which they were made, not misleading.

            (b) The Company shall prepare and file with the SEC such  amendments
(including   post-effective   amendments)  and  supplements  to  a  Registration
Statement  and  the  prospectus  used  in  connection  with  such   Registration
Statement,  which  prospectus  is to be filed  pursuant to Rule 424  promulgated
under  the  Securities  Act,  as may be  necessary  to  keep  such  Registration
Statement  effective at all times during the  Registration  Period,  and, during
such period,  comply with the  provisions of the  Securities Act with respect to
the  disposition of all  Registrable  Securities of the Company  covered by such
Registration  Statement  until such time as all of such  Registrable  Securities
shall  have  been  disposed  of in  accordance  with  the  intended  methods  of
disposition by the seller or sellers  thereof as set forth in such  Registration
Statement. In the case of amendments and supplements to a Registration Statement
which are required to be filed pursuant to this Agreement (including pursuant to
this Section  3(b)) by reason of the  Company's  filing a report on Form 10-KSB,
Form 10-QSB or Form 8-K or any analogous  report under the  Securities  Exchange
Act of 1934, as amended (the "Exchange Act"), the Company shall incorporate such
report by reference into the  Registration  Statement,  if applicable,  or shall
file such  amendments or  supplements  with the SEC on the same day on which the
Exchange Act report is filed which  created the  requirement  for the Company to
amend or supplement the Registration Statement.

            (c) The Company  shall furnish to each  Investor  whose  Registrable
Securities are included in any Registration  Statement,  without charge,  (i) at
least one (1) copy of such Registration  Statement as declared  effective by the
SEC and any amendment(s) thereto,  including financial statements and schedules,
all  documents  incorporated  therein  by  reference,   all  exhibits  and  each
preliminary prospectus, (ii) ten (10) copies of the final prospectus included in
such Registration  Statement and all amendments and supplements thereto (or such
other number of copies as such Investor may  reasonably  request) and (iii) such
other  documents as such  Investor may  reasonably  request from time to time in
order to facilitate the disposition of the Registrable  Securities owned by such
Investor.


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<PAGE>

            (d) The  Company  shall use its best  efforts  to (i)  register  and
qualify the  Registrable  Securities  covered by a Registration  Statement under
such other  securities  or "blue sky" laws of such  jurisdictions  in the United
States as any  Investor  reasonably  requests,  (ii)  prepare  and file in those
jurisdictions,   such  amendments  (including  post-effective   amendments)  and
supplements  to such  registrations  and  qualifications  as may be necessary to
maintain the effectiveness  thereof during the Registration  Period,  (iii) take
such other  actions as may be  necessary  to  maintain  such  registrations  and
qualifications in effect at all times during the Registration  Period,  and (iv)
take all  other  actions  reasonably  necessary  or  advisable  to  qualify  the
Registrable Securities for sale in such jurisdictions;  provided,  however, that
the  Company  shall not be required in  connection  therewith  or as a condition
thereto to (w) make any change to its articles of incorporation or by-laws,  (x)
qualify to do  business  in any  jurisdiction  where it would not  otherwise  be
required to qualify but for this  Section  3(d),  (y) subject  itself to general
taxation in any such  jurisdiction,  or (z) file a general consent to service of
process  in any such  jurisdiction.  The  Company  shall  promptly  notify  each
Investor who holds  Registrable  Securities of the receipt by the Company of any
notification with respect to the suspension of the registration or qualification
of any of the Registrable Securities for sale under the securities or "blue sky"
laws of any jurisdiction in the United States or its receipt of actual notice of
the initiation or threat of any proceeding for such purpose.

            (e) As promptly as practicable after becoming aware of such event or
development,  the Company shall notify each Investor in writing of the happening
of any event as a result  of which the  prospectus  included  in a  Registration
Statement, as then in effect, includes an untrue statement of a material fact or
omission to state a material fact required to be stated  therein or necessary to
make the statements therein, in light of the circumstances under which they were
made,  not  misleading  (provided that in no event shall such notice contain any
material, nonpublic information), and promptly prepare a supplement or amendment
to such Registration Statement to correct such untrue statement or omission, and
deliver ten (10) copies of such  supplement or amendment to each  Investor.  The
Company  shall  also  promptly  notify  each  Investor  in  writing  (i)  when a
prospectus or any  prospectus  supplement or  post-effective  amendment has been
filed,  and when a Registration  Statement or any  post-effective  amendment has
become effective  (notification of such effectiveness shall be delivered to each
Investor  by  facsimile  on the  same  day of such  effectiveness),  (ii) of any
request by the SEC for amendments or supplements to a Registration  Statement or
related prospectus or related information, and (iii) of the Company's reasonable
determination that a post-effective  amendment to a Registration Statement would
be appropriate.

            (f) The Company  shall use its best  efforts to prevent the issuance
of any  stop  order or  other  suspension  of  effectiveness  of a  Registration
Statement,  or the  suspension of the  qualification  of any of the  Registrable
Securities for sale in any jurisdiction within the United States of America and,
if such an order or suspension is issued, to obtain the withdrawal of such order
or  suspension at the earliest  possible  moment and to notify each Investor who
holds  Registrable  Securities  being sold of the issuance of such order and the
resolution  thereof or its receipt of actual notice of the  initiation or threat
of any proceeding for such purpose.

            (g) At the  reasonable  request of any  Investor,  the Company shall
furnish to such Investor,  on the date of the  effectiveness of the Registration
Statement  and  thereafter  from time to time on such dates as an  Investor  may
reasonably request (i) a letter, dated such date, from the Company's independent
certified  public  accountants in form and substance as is customarily  given by
independent  certified  public  accountants to  underwriters  in an underwritten
public  offering,  and  (ii) an  opinion,  dated  as of such  date,  of  counsel
representing the Company for purposes of such Registration  Statement,  in form,
scope and substance as is customarily given in an underwritten  public offering,
addressed to the Investors.


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<PAGE>

            (h) The  Company  shall make  available  for  inspection  by (i) any
Investor and (ii) one (1) firm of  accountants  or other agents  retained by the
Investors  (collectively,  the "Inspectors")  all pertinent  financial and other
records,  and  pertinent  corporate  documents  and  properties  of the  Company
(collectively,  the "Records"),  as shall be reasonably deemed necessary by each
Inspector,  and cause the Company's officers,  directors and employees to supply
all information which any Inspector may reasonably request;  provided,  however,
that each Inspector  shall agree,  and each Investor  hereby agrees,  to hold in
strict  confidence and shall not make any disclosure  (except to an Investor) or
use any Record or other information  which the Company  determines in good faith
to be confidential,  and of which  determination the Inspectors are so notified,
unless (a) the  disclosure  of such  Records is  necessary to avoid or correct a
misstatement or omission in any Registration  Statement or is otherwise required
under the Securities Act, (b) the release of such Records is ordered pursuant to
a final,  non-appealable  subpoena or order from a court or  government  body of
competent  jurisdiction,  or (c) the  information  in such Records has been made
generally  available to the public other than by disclosure in violation of this
or any other  agreement of which the Inspector  and the Investor has  knowledge.
Each  Investor  agrees that it shall,  upon  learning  that  disclosure  of such
Records  is  sought  in  or  by  a  court  or  governmental  body  of  competent
jurisdiction or through other means, give prompt notice to the Company and allow
the  Company,  at its  expense,  to  undertake  appropriate  action  to  prevent
disclosure  of,  or to  obtain  a  protective  order  for,  the  Records  deemed
confidential.

            (i) The Company shall hold in confidence and not make any disclosure
of  information  concerning  an  Investor  provided  to the  Company  unless (i)
disclosure  of such  information  is  necessary  to comply with federal or state
securities  laws, (ii) the disclosure of such  information is necessary to avoid
or correct a misstatement or omission in any Registration  Statement,  (iii) the
release of such  information  is ordered  pursuant to a subpoena or other final,
non-appealable   order  from  a  court  or   governmental   body  of   competent
jurisdiction,  or (iv) such information has been made generally available to the
public other than by  disclosure  in  violation  of this  Agreement or any other
agreement.  The Company agrees that it shall,  upon learning that  disclosure of
such  information  concerning  an  Investor  is  sought  in  or  by a  court  or
governmental body of competent  jurisdiction or through other means, give prompt
written  notice to such  Investor  and allow such  Investor,  at the  Investor's
expense, to undertake  appropriate action to prevent disclosure of, or to obtain
a protective order for, such information.

            (j) The Company  shall use its best efforts  either to cause all the
Registrable  Securities covered by a Registration  Statement (i) to be listed on
each securities  exchange on which securities of the same class or series issued
by the Company  are then  listed,  if any,  if the  listing of such  Registrable
Securities  is then  permitted  under  the  rules of such  exchange  or (ii) the
inclusion for quotation on the National Association of Securities Dealers,  Inc.
OTC Bulletin Board for such  Registrable  Securities.  The Company shall pay all
fees and  expenses in  connection  with  satisfying  its  obligation  under this
Section 3(j).


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<PAGE>

            (k)  The  Company  shall  cooperate  with  the  Investors  who  hold
Registrable  Securities  being  offered  and,  to  the  extent  applicable,   to
facilitate the timely  preparation and delivery of certificates (not bearing any
restrictive  legend)  representing  the  Registrable  Securities  to be  offered
pursuant to a Registration  Statement and enable such certificates to be in such
denominations  or amounts,  as the case may be, as the Investors may  reasonably
request and registered in such names as the Investors may request.

            (l) The Company shall use its best efforts to cause the  Registrable
Securities  covered by the  applicable  Registration  Statement to be registered
with or approved by such other  governmental  agencies or  authorities as may be
necessary to consummate the disposition of such Registrable Securities.

            (m) The  Company  shall make  generally  available  to its  security
holders  as soon as  practical,  but not later than  ninety  (90) days after the
close of the period covered  thereby,  an earnings  statement (in form complying
with the provisions of Rule 158 under the Securities Act) covering a twelve (12)
month  period  beginning  not later than the first day of the  Company's  fiscal
quarter next following the effective date of the Registration Statement.

            (n) The Company shall  otherwise use its best efforts to comply with
all  applicable  rules  and  regulations  of the  SEC  in  connection  with  any
registration hereunder.

            (o) Within two (2)  business  days  after a  Registration  Statement
which  covers  Registrable  Securities  is declared  effective  by the SEC,  the
Company shall deliver, and shall cause legal counsel for the Company to deliver,
to the  transfer  agent  for such  Registrable  Securities  (with  copies to the
Investors  whose  Registrable  Securities  are  included  in  such  Registration
Statement)  confirmation  that such  Registration  Statement  has been  declared
effective by the SEC in the form attached hereto as Exhibit B.

            (p) The Company shall take all other reasonable actions necessary to
expedite and facilitate  disposition by the Investors of Registrable  Securities
pursuant to a Registration Statement.

      4. OBLIGATIONS OF THE INVESTORS.

      Each Investor  agrees that, upon receipt of any notice from the Company of
the  happening  of any event of the kind  described in Section 3(f) or the first
sentence of 3(e),  such Investor will  immediately  discontinue  disposition  of
Registrable  Securities pursuant to any Registration  Statement(s) covering such
Registrable  Securities  until  such  Investor's  receipt  of the  copies of the
supplemented  or amended  prospectus  contemplated by Section 3(e) or receipt of
notice that no supplement or amendment is required.  Notwithstanding anything to
the contrary,  the Company shall cause its transfer agent to deliver  unlegended
certificates  for  shares of Common  Stock to a  transferee  of an  Investor  in
accordance  with the terms of the  Securities  Purchase  Agreement in connection
with any sale of  Registrable  Securities  with respect to which an Investor has
entered  into a contract  for sale prior to the  Investor's  receipt of a notice
from the Company of the happening of any event of the kind  described in Section
3(f) or the  first  sentence  of 3(e) and for  which  the  Investor  has not yet
settled.


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<PAGE>

      5. EXPENSES OF REGISTRATION.

      All  expenses  incurred  in  connection  with  registrations,  filings  or
qualifications pursuant to Sections 2 and 3, including,  without limitation, all
registration,  listing and qualifications fees,  printers,  legal and accounting
fees shall be paid by the Company.

      6. INDEMNIFICATION.

      With  respect  to   Registrable   Securities   which  are  included  in  a
Registration Statement under this Agreement:

            (a) To the fullest  extent  permitted by law, the Company will,  and
hereby does, indemnify,  hold harmless and defend each Investor,  the directors,
officers, partners,  employees, agents,  representatives of, and each Person, if
any, who controls any Investor  within the meaning of the  Securities Act or the
Exchange  Act (each,  an  "Indemnified  Person"),  against any  losses,  claims,
damages,  liabilities,  judgments, fines, penalties,  charges, costs, reasonable
attorneys'  fees,  amounts  paid in  settlement  or  expenses,  joint or several
(collectively,  "Claims") incurred in investigating,  preparing or defending any
action, claim, suit, inquiry, proceeding, investigation or appeal taken from the
foregoing  by or  before  any  court or  governmental,  administrative  or other
regulatory  agency,  body or the SEC, whether pending or threatened,  whether or
not an indemnified party is or may be a party thereto  ("Indemnified  Damages"),
to which any of them may become  subject  insofar as such  Claims (or actions or
proceedings,  whether commenced or threatened,  in respect thereof) arise out of
or are based upon:  (i) any untrue  statement or alleged  untrue  statement of a
material  fact  in a  Registration  Statement  or any  post-effective  amendment
thereto  or in any  filing  made in  connection  with the  qualification  of the
offering  under the securities or other "blue sky" laws of any  jurisdiction  in
which Registrable Securities are offered ("Blue Sky Filing"), or the omission or
alleged  omission  to state a material  fact  required  to be stated  therein or
necessary  to make the  statements  therein  not  misleading;  (ii)  any  untrue
statement or alleged untrue  statement of a material fact contained in any final
prospectus  (as  amended or  supplemented,  if the Company  files any  amendment
thereof or supplement  thereto with the SEC) or the omission or alleged omission
to state  therein  any  material  fact  necessary  to make the  statements  made
therein,  in light of the circumstances  under which the statements therein were
made, not misleading; or (iii) any violation or alleged violation by the Company
of the  Securities  Act, the Exchange  Act,  any other law,  including,  without
limitation,  any state  securities  law, or any rule or  regulation  there under
relating  to the  offer  or sale of the  Registrable  Securities  pursuant  to a
Registration  Statement (the matters in the foregoing  clauses (i) through (iii)
being,  collectively,  "Violations").  The Company shall reimburse the Investors
and each such controlling  person promptly as such expenses are incurred and are
due and  payable,  for any  legal  fees or  disbursements  or  other  reasonable
expenses incurred by them in connection with investigating or defending any such
Claim.   Notwithstanding   anything  to  the  contrary   contained  herein,  the
indemnification agreement contained in this Section 6(a): (x) shall not apply to
a Claim by an Indemnified  Person arising out of or based upon a Violation which
occurs in reliance upon and in conformity with information  furnished in writing
to the Company by such  Indemnified  Person expressly for use in connection with
the preparation of the Registration  Statement or any such amendment  thereof or
supplement thereto; (y) shall not be available to the extent such Claim is based
on a  failure  of the  Investor  to  deliver  or to  cause to be  delivered  the
prospectus  made  available by the Company,  if such  prospectus was timely made
available by the Company  pursuant to Section  3(c);  and (z) shall not apply to
amounts paid in settlement of any Claim if such  settlement is effected  without
the  prior  written  consent  of  the  Company,   which  consent  shall  not  be
unreasonably  withheld.  Such  indemnity  shall  remain in full force and effect
regardless of any investigation  made by or on behalf of the Indemnified  Person
and shall  survive the transfer of the  Registrable  Securities by the Investors
pursuant to Section 9 hereof.


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<PAGE>

            (b) In  connection  with a  Registration  Statement,  each  Investor
agrees to severally and not jointly indemnify,  hold harmless and defend, to the
same extent and in the same manner as is set forth in Section 6(a), the Company,
each of its  directors,  each of its officers,  employees,  representatives,  or
agents and each Person,  if any, who controls the Company  within the meaning of
the Securities Act or the Exchange Act (each an  "Indemnified  Party"),  against
any Claim or Indemnified Damages to which any of them may become subject,  under
the  Securities  Act, the Exchange  Act or  otherwise,  insofar as such Claim or
Indemnified Damages arise out of or is based upon any Violation, in each case to
the extent, and only to the extent,  that such Violation occurs in reliance upon
and in  conformity  with  written  information  furnished to the Company by such
Investor expressly for use in connection with such Registration Statement;  and,
subject  to  Section  6(d),  such  Investor  will  reimburse  any legal or other
expenses  reasonably  incurred  by  them in  connection  with  investigating  or
defending  any such  Claim;  provided,  however,  that the  indemnity  agreement
contained in this Section 6(b) and the  agreement  with respect to  contribution
contained  in Section 7 shall not apply to  amounts  paid in  settlement  of any
Claim if such  settlement is effected  without the prior written consent of such
Investor, which consent shall not be unreasonably withheld;  provided,  further,
however, that the Investor shall be liable under this Section 6(b) for only that
amount of a Claim or Indemnified  Damages as does not exceed the net proceeds to
such Investor as a result of the sale of Registrable Securities pursuant to such
Registration  Statement.  Such  indemnity  shall remain in full force and effect
regardless of any  investigation  made by or on behalf of such Indemnified Party
and shall  survive the transfer of the  Registrable  Securities by the Investors
pursuant  to Section  9.  Notwithstanding  anything  to the  contrary  contained
herein,  the  indemnification  agreement  contained  in this  Section  6(b) with
respect to any  prospectus  shall not inure to the  benefit  of any  Indemnified
Party if the untrue  statement  or omission of material  fact  contained  in the
prospectus  was corrected and such new prospectus was delivered to each Investor
prior to such Investor's use of the prospectus to which the Claim relates.

            (c) Promptly after receipt by an  Indemnified  Person or Indemnified
Party  under  this  Section  6 of notice of the  commencement  of any  action or
proceeding  (including any governmental action or proceeding) involving a Claim,
such  Indemnified  Person or  Indemnified  Party  shall,  if a Claim in  respect
thereof is to be made  against  any  indemnifying  party  under this  Section 6,
deliver to the indemnifying party a written notice of the commencement  thereof,
and the  indemnifying  party shall have the right to participate in, and, to the
extent the indemnifying  party so desires,  jointly with any other  indemnifying
party similarly  noticed,  to assume control of the defense thereof with counsel
mutually  satisfactory to the indemnifying  party and the Indemnified  Person or
the  Indemnified  Party,  as  the  case  may  be;  provided,  however,  that  an
Indemnified  Person or Indemnified  Party shall have the right to retain its own
counsel  with the fees and  expenses  of not more than one (1)  counsel for such
Indemnified  Person or Indemnified  Party to be paid by the indemnifying  party,
if, in the reasonable opinion of counsel retained by the indemnifying party, the
representation  by such counsel of the Indemnified  Person or Indemnified  Party
and the  indemnifying  party would be  inappropriate  due to actual or potential
differing interests between such Indemnified Person or Indemnified Party and any
other party  represented  by such counsel in such  proceeding.  The  Indemnified
Party or Indemnified Person shall cooperate fully with the indemnifying party in
connection  with any  negotiation  or defense of any such action or claim by the


                                       8
<PAGE>

indemnifying  party and shall furnish to the indemnifying  party all information
reasonably  available  to the  Indemnified  Party or  Indemnified  Person  which
relates  to such  action  or  claim.  The  indemnifying  party  shall  keep  the
Indemnified  Party or  Indemnified  Person fully apprised at all times as to the
status of the defense or any settlement  negotiations  with respect thereto.  No
indemnifying  party shall be liable for any  settlement of any action,  claim or
proceeding effected without its prior written consent;  provided,  however, that
the indemnifying party shall not unreasonably  withhold,  delay or condition its
consent.  No indemnifying party shall,  without the prior written consent of the
Indemnified  Party or  Indemnified  Person,  consent to entry of any judgment or
enter into any  settlement  or other  compromise  which  does not  include as an
unconditional  term  thereof  the giving by the  claimant or  plaintiff  to such
Indemnified  Party or  Indemnified  Person of a release  from all  liability  in
respect to such claim or litigation.  Following  indemnification as provided for
hereunder,  the  indemnifying  party  shall be  subrogated  to all rights of the
Indemnified Party or Indemnified Person with respect to all third parties, firms
or corporations  relating to the matter for which indemnification has been made.
The  failure  to  deliver  written  notice to the  indemnifying  party  within a
reasonable  time of the  commencement  of any such action shall not relieve such
indemnifying  party of any liability to the  Indemnified  Person or  Indemnified
Party under this Section 6, except to the extent that the indemnifying  party is
prejudiced in its ability to defend such action.

            (d) The indemnification  required by this Section 6 shall be made by
periodic  payments of the amount thereof during the course of the  investigation
or defense, as and when bills are received or Indemnified Damages are incurred.

            (e) The indemnity  agreements  contained herein shall be in addition
to (i) any  cause  of  action  or  similar  right  of the  Indemnified  Party or
Indemnified  Person  against  the  indemnifying  party or  others,  and (ii) any
liabilities the indemnifying party may be subject to pursuant to the law.

      7. CONTRIBUTION.

      To the extent any  indemnification  by an indemnifying party is prohibited
or  limited  by  law,  the  indemnifying   party  agrees  to  make  the  maximum
contribution  with respect to any amounts for which it would otherwise be liable
under Section 6 to the fullest extent permitted by law; provided, however, that:
(i) no seller of Registrable  Securities guilty of fraudulent  misrepresentation
(within the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution  from any seller of  Registrable  Securities  who was not guilty of
fraudulent misrepresentation; and (ii) contribution by any seller of Registrable
Securities shall be limited in amount to the net amount of proceeds  received by
such seller from the sale of such Registrable Securities.


                                       9
<PAGE>

      8. REPORTS UNDER THE EXHANGE ACT.

      With a view to making  available to the Investors the benefits of Rule 144
promulgated  under the  Securities  Act or any similar rule or regulation of the
SEC that may at any time permit the Investors to sell  securities of the Company
to the public without registration ("Rule 144") the Company agrees to:

            (a) make and keep public information  available,  as those terms are
understood and defined in Rule 144;

            (b) file  with the SEC in a timely  manner  all  reports  and  other
documents  required of the Company under the Securities Act and the Exchange Act
so long as the Company remains subject to such requirements (it being understood
that nothing herein shall limit the Company's  obligations under Section 4(c) of
the  Securities  Purchase  Agreement)  and the filing of such  reports and other
documents as are required by the applicable provisions of Rule 144; and

            (c)  furnish  to  each  Investor  so  long  as  such  Investor  owns
Registrable  Securities,  promptly upon request,  (i) a written statement by the
Company that it has complied  with the reporting  requirements  of Rule 144, the
Securities  Act and the Exchange  Act,  (ii) a copy of the most recent annual or
quarterly report of the Company and such other reports and documents so filed by
the Company,  and (iii) such other information as may be reasonably requested to
permit  the  Investors  to sell such  securities  pursuant  to Rule 144  without
registration.

      9. AMENDMENT OF REGISTRATION RIGHTS.

      Provisions of this Agreement may be amended and the observance thereof may
be waived (either generally or in a particular instance and either retroactively
or  prospectively),  only with the written  consent of the Company and Investors
who then  hold at least  two-thirds  (2/3) of the  Registrable  Securities.  Any
amendment or waiver  effected in accordance with this Section 9 shall be binding
upon each Investor and the Company.  No such amendment shall be effective to the
extent  that it  applies to fewer  than all of the  holders  of the  Registrable
Securities.  No consideration shall be offered or paid to any Person to amend or
consent to a waiver or  modification  of any provision of any of this  Agreement
unless the same  consideration  also is  offered  to all of the  parties to this
Agreement.

      10. MISCELLANEOUS.

            (a) A Person  is deemed  to be a holder  of  Registrable  Securities
whenever  such  Person  owns or is  deemed  to own of  record  such  Registrable
Securities.  If  the  Company  receives  conflicting  instructions,  notices  or
elections  from two (2) or more  Persons  with  respect to the same  Registrable
Securities,  the  Company  shall act upon the basis of  instructions,  notice or
election received from the registered owner of such Registrable Securities.

            (b) Any notices,  consents, waivers or other communications required
or  permitted to be given under the terms of this  Agreement  must be in writing
and will be deemed to have been  delivered:  (i) upon  receipt,  when  delivered
personally;  (ii) upon receipt, when sent by facsimile (provided confirmation of
transmission is mechanically or electronically generated and kept on file by the
sending  party);  or (iii) one (1) business day after  deposit with a nationally
recognized  overnight  delivery service,  in each case properly addressed to the
party to  receive  the  same.  The  addresses  and  facsimile  numbers  for such
communications shall be:


                                       10
<PAGE>

If to the Company, to:    EarthShell Corporation
                          1301 York Road, Suite 200
                          Lutherville, MD 20193
                          Attention: Scott Houston
                          Telephone: (410) 847-9420
                          Facsimile: (410) 847-9431

With Copy to:             Kirkpatrick & Lockhart Nicholson Graham LLP
                          201 S. Biscayne Blvd., Suite 2000
                          Miami, FL 33131
                          Attention: Clayton E. Parker, Esq.
                          Telephone: (305) 539-3306
                          Facsimile: (305) 358-7095

If to an  Investor,  to its  address  and  facsimile  number on the  Schedule of
Investors attached hereto, with copies to such Investor's representatives as set
forth on the  Schedule of Investors or to such other  address  and/or  facsimile
number and/or to the  attention of such other person as the recipient  party has
specified by written notice given to each other party five (5) days prior to the
effectiveness of such change.  Written  confirmation of receipt (A) given by the
recipient  of  such  notice,  consent,   waiver  or  other  communication,   (B)
mechanically  or  electronically  generated  by the sender's  facsimile  machine
containing the time, date,  recipient facsimile number and an image of the first
page of such  transmission  or (C)  provided by a courier or  overnight  courier
service shall be rebuttable  evidence of personal service,  receipt by facsimile
or receipt from a nationally recognized overnight delivery service in accordance
with clause (i), (ii) or (iii) above, respectively.

            (c) Failure of any party to exercise  any right or remedy under this
Agreement or otherwise,  or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

            (d) The laws of the State of New  Jersey  shall  govern  all  issues
concerning  the  relative  rights  of  the  Company  and  the  Investors  as its
stockholders.  All  other  questions  concerning  the  construction,   validity,
enforcement  and  interpretation  of this  Agreement  shall be  governed  by the
internal laws of the State of New Jersey, without giving effect to any choice of
law or conflict of law  provision or rule (whether of the State of New Jersey or
any other  jurisdiction)  that would  cause the  application  of the laws of any
jurisdiction  other than the State of New Jersey.  Each party hereby irrevocably
submits to the non-exclusive jurisdiction of the Superior Courts of the State of
New Jersey,  sitting in Hudson  County,  New Jersey and  federal  courts for the
District of New Jersey sitting Newark,  New Jersey,  for the adjudication of any
dispute hereunder or in connection herewith or with any transaction contemplated
hereby or discussed herein,  and hereby  irrevocably  waives,  and agrees not to
assert in any suit,  action or  proceeding,  any claim that it is not personally
subject  to the  jurisdiction  of any such  court,  that  such  suit,  action or
proceeding is brought in an  inconvenient  forum or that the venue of such suit,
action or proceeding is improper.  Each party hereby irrevocably waives personal
service of process and consents to process being served in any such suit, action


                                       11
<PAGE>

or  proceeding  by mailing a copy  thereof to such party at the address for such
notices to it under this Agreement and agrees that such service shall constitute
good and sufficient  service of process and notice  thereof.  Nothing  contained
herein  shall be deemed to limit in any way any  right to serve  process  in any
manner  permitted by law. If any provision of this Agreement shall be invalid or
unenforceable in any jurisdiction, such invalidity or unenforceability shall not
affect the validity or enforceability of the remainder of this Agreement in that
jurisdiction  or the  validity  or  enforceability  of  any  provision  of  this
Agreement in any other  jurisdiction.  EACH PARTY HEREBY  IRREVOCABLY WAIVES ANY
RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST,  A JURY TRIAL FOR THE ADJUDICATION
OF ANY  DISPUTE  HEREUNDER  OR IN  CONNECTION  HEREWITH  OR ARISING  OUT OF THIS
AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY.

            (e) This Agreement, the Irrevocable Transfer Agent Instructions, the
Securities  Purchase  Agreement and related documents  including the Convertible
Debenture  and the  Escrow  Agreement  dated  the date  hereof  by and among the
Company,  the Investors set forth on the Schedule of Investors  attached hereto,
and David Gonzalez,  Esq. (the "Escrow  Agreement")  and the Security  Agreement
dated the date hereof (the "Security Agreement") constitute the entire agreement
among the parties  hereto with respect to the subject matter hereof and thereof.
There are no  restrictions,  promises,  warranties or  undertakings,  other than
those  set  forth or  referred  to  herein  and  therein.  This  Agreement,  the
Irrevocable  Transfer Agent Instructions,  the Securities Purchase Agreement and
related documents including the Convertible Debenture,  the Escrow Agreement and
the Security Agreement  supersede all prior agreements and understandings  among
the parties hereto with respect to the subject matter hereof and thereof.

            (f) This Agreement shall inure to the benefit of and be binding upon
the permitted successors and assigns of each of the parties hereto.

            (g) The headings in this Agreement are for  convenience of reference
only and shall not limit or otherwise affect the meaning hereof.

            (h) This Agreement may be executed in identical  counterparts,  each
of which shall be deemed an original but all of which shall  constitute  one and
the same agreement.  This Agreement,  once executed by a party, may be delivered
to the other party hereto by facsimile  transmission of a copy of this Agreement
bearing the signature of the party so delivering this Agreement.

            (i)  Each  party  shall  do and  perform,  or  cause  to be done and
performed,  all such further acts and things,  and shall execute and deliver all
such other  agreements,  certificates,  instruments and documents,  as the other
party may reasonably request in order to carry out the intent and accomplish the
purposes of this Agreement and the consummation of the transactions contemplated
hereby.

The language used in this Agreement will be deemed to be the language  chosen by
the parties to express their mutual  intent and no rules of strict  construction
will be applied against any party.

            (j) This Agreement is intended for the benefit of the parties hereto
and  their  respective  permitted  successors  and  assigns,  and is not for the
benefit of, nor may any provision hereof be enforced by, any other Person.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                       12
<PAGE>

      IN WITNESS  WHEREOF,  the parties have caused this  Investor  Registration
Rights Agreement to be duly executed as of day and year first above written.

                                            COMPANY:

                                            EARTHSHELL CORPORATION


                                            By: /s/ Scott Houston
                                               ---------------------------------
                                               Name:  Scott Houston
                                               Title: Chief Financial Officer


                                       13
<PAGE>

                                   SCHEDULE I

                              SCHEDULE OF INVESTORS

<TABLE>
<CAPTION>
                                                                                 Address/Facsimile
          Name                                Signature                         Number of Investors
          ----                                ---------                         -------------------
<S>                                <C>                                    <C>
Cornell Capital Partners, LP       By:  Yorkville Advisors, LLC           101 Hudson Street - Suite 3700
                                   Its: General Partner                   Jersey City, NJ  07303
                                                                          Facsimile: (201) 985-8266

                                   By:
                                      -----------------------------
                                      Name: Mark Angelo
                                      Its:  Portfolio Manager

With a copy to:                    Troy Rillo, Esq.                       101 Hudson Street - Suite 3700
                                                                          Jersey City, NJ 07302
                                                                          Facsimile: (201) 985-8266
</TABLE>
<PAGE>

                                    EXHIBIT A

                              REGISTRBLE SECURITIES

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------

                                   Shares of Common Stock
     Selling Stockholder              to be Registered                          Description
------------------------------------------------------------------------------------------------------------------------
<S>                                       <C>              <C>
Cornell Capital Partners, LP                143,550        Shares of Common Stock issued to Cornell Capital Partners, LP
                                                           on or about March 23, 2005 in connection with a financing
                                                           transaction
------------------------------------------------------------------------------------------------------------------------
Cornell Capital Partners, LP              6,700,000        Shares of Common Stock underlying Convertible Debentures
------------------------------------------------------------------------------------------------------------------------
Cornell Capital Partners, LP                660,500        Shares of Common Stock underlying warrants
------------------------------------------------------------------------------------------------------------------------
Highgate House Funds, Ltd.                  364,500        Shares of Common Stock underlying warrants
------------------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>

                                    EXHIBIT B

                         FORM OF NOTICE OF EFFECTIVENESS
                            OF REGISTRATION STATEMENT

Attention:

      Re:   EARTHSHELL CORPORATION

Ladies and Gentlemen:

      We are counsel to  EarthShell  Corporation,  a Delaware  corporation  (the
"Company"),  and have  represented  the Company in connection  with that certain
Securities Purchase Agreement (the "Securities Purchase Agreement") entered into
by and among the Company and the  investors  named  therein  (collectively,  the
"Investors") pursuant to which the Company issued to the Investors shares of its
Common Stock, par value $0.001 per share (the "Common  Stock").  Pursuant to the
Purchase  Agreement,  the Company  also has entered into a  Registration  Rights
Agreement  with the Investors  (the "Investor  Registration  Rights  Agreement")
pursuant  to which the  Company  agreed,  among other  things,  to register  the
Registrable  Securities (as defined in the Registration  Rights Agreement) under
the Securities  Act of 1933, as amended (the  "Securities  Act").  In connection
with the Company's  obligations  under the  Registration  Rights  Agreement,  on
____________  ____, the Company filed a Registration  Statement on Form ________
(File No.  333-_____________) (the "Registration Statement") with the Securities
and Exchange SEC (the "SEC") relating to the Registrable  Securities which names
each of the Investors as a selling stockholder there under.

      In connection with the foregoing, we advise you that a member of the SEC's
staff has advised us by  telephone  that the SEC has entered an order  declaring
the Registration  Statement effective under the Securities Act at [ENTER TIME OF
EFFECTIVENESS] on [ENTER DATE OF EFFECTIVENESS] and we have no knowledge,  after
telephonic  inquiry  of a  member  of the  SEC's  staff,  that  any  stop  order
suspending its  effectiveness  has been issued or that any  proceedings for that
purpose  are  pending  before,  or  threatened  by, the SEC and the  Registrable
Securities  are  available for resale under the  Securities  Act pursuant to the
Registration Statement.

                                            Very truly yours,

                                            [Law Firm]


                                            By:
                                               ---------------------------------



cc:   [LIST NAMES OF INVESTORS]


                                       16