(...) If there were a real camera dat file that included facing information, look_at.dat would then be unnecessary, and the pairing problem would go away. --Travis (16 years ago, 5-Dec-08, to lugnet.cad)
(...) Knowing where the look_at point is actually located is necessary with certain camera types and if you want to do things like add focal blur. Also, it would be needlessly difficult for users to have to try and calculate the proper rotation (...) (16 years ago, 7-Dec-08, to lugnet.cad)