Alright, built another effect, this one took some testing, but eventually came out usable - Tabletop (are the names getting weird yet?)
It basically shifts the image in "perspective" just with 0 regard to any perspective laws. You can use it as a poor man's taper if you wish. Not bad for interfaces as seen in the example GIF.
Added to first page and distro.
NOTE: I feel like the fake perspective shouldn't be too tough, but don't have the head for math this evening - if someone could take a look that would be great. It's almost like a poor man's R0J0hound 's mode 7 effect (without rotation, though). I feel like it should be more efficient, though as there's barely any math being done so it could be used for some mild pseudo-3D stuff (like racing games).