I’ve tried to test my post processing materials in Oculus Rift DK2. Unfortunately they are bugged in VR mode. So I tried to trace the problem and created simple post processing material outputting ScreenAlignedUVs node.
This is how it looks like when no VR is used. As expected it goes from 0 to 1 in both directions, so we get black to yellow, works fine!
Now there’s the same material but in VR mode. As you see it’s wrong. While y coord still goes from 0 to 1 in both eyes, x coord goes from 0 to 1 in the left eye, but right eye has wrong x coord (I think it’s from 1 to 2)
Due to this my blendables are broken because I do distortion in the materials.
I’m using UE 4.7.