I watched this movie some years ago and only remember a scene in particular, near the final, when many animals (or creatures?) are on a conveyor belt and are going into a great spaceship. The scene takes place I remember in an enoumous ambient where is placed the spaceship, and this ambient is mainly pink-red in color (not very sure about this). Sorry but don’t remember any more details. I’m sure it is a Hollywood movie, not very old (no more than 10-20 years), and almost sure not an animation movie. Anyone may help me to identify it?
Echoing Andrew Thompson's comment, I'm fairly sure this is Sky Captain and the World of Tomorrow. The scene you've described is below and the background "ambient" often includes backgrounds in pink and red.
I can easily see how the sort of noir-style colouration could make you think it was an animated feature.