This is a two part idea:
1 Add extra pages to the projection category.
Might be wise to do this first so that the non-maths mode is figured out and it is determined how useful an assistant can be.
2 Add more assistants
- Panini: http://tksharpless.net/vedutismo/Pannini/ , https://github.com/shaunlebron/blinky/blob/master/game/lua-scripts/lenses/panini.lua
- Equireactangular? (Can't find maths)