For my 2D platformer I would like to be able to do a nice heat shimmer where the heat makes things distorted and all that in desert or lava levels.I'm not sure the best way to do this though. I tried putting Warp on my tiled background in a test level and it lowered the framerate. Also, with Warp I'd have to put it on each object I want heat shimmer on. I'm not sure if I want the shimmer on just the background or everything or just select objects, but I'm certain that adding warp on each object would kill the framerate. I'd like to know the best way to do this kind of effect (preferably with control over what gets effected, though that isn't as important as framerate).
Thanks in advance