Currently the displacement filter uses (linear?) interpolation when applied. I think it'd be helpful to have a way to change this behaviour to work in a nearest-neighbour sampling style considering that many games use pixel art which doesn't mesh well with linear pixel interpolation.

Option A:
Add a flags argument to the filter and let it take a flag which changes this behaviour.

Option B:
If the object to which the filter is attached to has the PIXEL_SCALE appearance flag then have the filter use nearest-neighbour sampling.