This will be hard to explain - i will try my best.
What i want to do:
Have a very low resolution (around 320x256), then have some PostProcess that relies heavy on custom depth, stencil masks and pixel position (after tonemapping), after this is done i want to upscale (prefered linear) to the set display resolution (in my case 1280x1024)
What i do now:
set my resolution to 1280x1024, use screen percentage to lower it to 320x256 with quality 0 (to have clean pixels), run my post process (pixel position and the depth mask stuff - works perfect) … but after that i cant find any solution to scale up the result, because it fills the screen already…
i cant use native 320x256 in fullscreen, will not work (seems ue4 has a minimum resolution?) i tried many different setups with screen percentage and modifieing uv but somehow the post process will work wrong (depth buffer wont work correct, or the effect running on pixel position)
im lost.