v_roma
Well-known
Going back (somewhat) to the OP, the other thing to consider is the environmental impact of producing and transporting the non-animal alternative to whatever you are trying to replace. Who's to say that, taken on the whole (i.e., cradle to grave), synthetic film would not be worse for the environment and, therefore, for many animals that rely on it, than gelatin-based film? Getting the full picture on products you consume is, unfortunately, difficult but I think very important for this kind of consideration.