I need to warp and animate a flat image in AE. It needs to look kind of like the lines of a football field moving across hills. The hills are static, but the lines move over it, maybe like a roller coaster moving across the tracks.
Is there a way to warp a flat image across a wavy path?
One way to accomplish this would be to pre-compose the field layer into a Precomp. Use a deform effect on the precomp layer to achieve desired waviness. Within the Precomp you can then animate the lines moving. This should create the effect of lines moving through the wave, deforming as they go to match it's contours.
As long as the movement is relatively simple, this should work.