An apparatus comprising: • a support assembly having a build platform with a build area defined below the build platform; • a track extending through the build area; and • a deposition mechanism mounted on the track and configured for producing a three-dimensional object on the build platform using a flowable resin in a layer-by-layer technique, the deposition mechanism comprising: - a carriage engaged with the track and configured for movement along the track through the build area; - a supply of flowable resin mounted on the carriage; - a roller in communication with the supply of flowable resin, wherein the roller is rotatably mounted on the carriage and configured for rotating to carry the flowable resin to an application site within the build area for application to produce the three-dimensional object as the carriage passes through the build area; and - an exposure device mounted on the carriage and configured for emitting electromagnetic waves through an outlet toward an exposure site within the build area to solidify applied resin applied by the roller to produce the three-dimensional object, wherein the roller is permeable to the electromagnetic waves and the outlet of the exposure device and the roller are positioned below the exposure site, such that the electromagnetic waves pass through the roller in traveling from the exposure device to the exposure site; characterized in that: said supply of flowable resin is configured as a vat configured to contain the flowable resin; and said roller is configured to be partially submerged in the flowable resin in the vat, wherein the roller is configured for rotating to carry the flowable resin from the vat to the application site within the build area for application to produce the three-dimensional object as the deposition mechanism passes through the build area. • a support assembly having a build platform with a build area defined below the build platform; • a track extending through the build area; and • a deposition mechanism mounted on the track and configured for producing a three-dimensional object on the build platform using a flowable resin in a layer-by-layer technique, the deposition mechanism comprising: - a carriage engaged with the track and configured for movement along the track through the build area; - a supply of flowable resin mounted on the carriage; - a roller in communication with the supply of flowable resin, wherein the roller is rotatably mounted on the carriage and configured for rotating to carry the flowable resin to an application site within the build area for application to produce the three-dimensional object as the carriage passes through the build area; and - an exposure device mounted on the carriage and configured for emitting electromagnetic waves through an outlet toward an exposure site within the build area to solidify applied resin applied by the roller to produce the three-dimensional object, wherein the roller is permeable to the electromagnetic waves and the outlet of the exposure device and the roller are positioned below the exposure site, such that the electromagnetic waves pass through the roller in traveling from the exposure device to the exposure site; characterized in that: said supply of flowable resin is configured as a vat configured to contain the flowable resin; and said roller is configured to be partially submerged in the flowable resin in the vat, wherein the roller is configured for rotating to carry the flowable resin from the vat to the application site within the build area for application to produce the three-dimensional object as the deposition mechanism passes through the build area. - a carriage engaged with the track and configured for movement along the track through the build area; - a supply of flowable resin mounted on the carriage; - a roller in communication with the supply of flowable resin, wherein the roller is rotatably mounted on the carriage and configured for rotating to carry the flowable resin to an application site within the build area for application to produce the three-dimensional object as the carriage passes through the build area; and - an exposure device mounted on the carriage and configured for emitting electromagnetic waves through an outlet toward an exposure site within the build area to solidify applied resin applied by the roller to produce the three-dimensional object, wherein the roller is permeable to the electromagnetic waves and the outlet of the exposure device and the roller are positioned below the exposure site, such that the electromagnetic waves pass through the roller in traveling from the exposure device to the exposure site; said supply of flowable resin is configured as a vat configured to contain the flowable resin; and said roller is configured to be partially submerged in the flowable resin in the vat, wherein the roller is configured for rotating to carry the flowable resin from the vat to the application site within the build area for application to produce the three-dimensional object as the deposition mechanism passes through the build area.