as with international summits the ground work is most important, and prior to the visit we had had close email contact with exchange of ideas and suggestions for future cooperation.

How would the previous sentence be correctly capitalized?
Answer: As with international summits the ground work is most important, and prior to the visit we had had close email contact with exchange of ideas and suggestions for future cooperation.
having the talent camps run simultaneously with a festival increases the talent's chances to get their films screened and for the promotion of the network, the network will hold panel discussions or artist talks with its members.

How would the previous sentence be correctly capitalized?
Answer: Having the Talent Camps run simultaneously with a festival increases the talent's chances to get their films screened and for the promotion of The Network, The Network will hold panel discussions or artist talks with its members.
also on the shape was a silver line just "inboard" from the outer edge, in a v-shape mirroring the triangle itself (see my really not very good drawing).

How would the previous sentence be correctly capitalized?
Answer: Also on the shape was a silver line just "inboard" from the outer edge, in a v-shape mirroring the triangle itself (see my really not very good drawing).
5:3 we are orphans and fatherless, our mothers are as widows.

How would the previous sentence be correctly capitalized?
Answer: 5:3 We are orphans and fatherless, our mothers are as widows.