i'm hunting for a cloudy nights user who has optical ray tracing software. i'm writing a book on color and want to create the ray trace of a raindrop. i've done the rainbow ray tracing and the ray tracing of a collimated beam, but i need the ray tracing of the "landscape" 180º image field passed through the raindrop and visible on the other side, per the simulation with a glass bowl attached. i believe this requires definition of the pupils and principal point but i am unsure how to do that.
any help will be appreciated and your diagram will be credited in the book.