I just got a new graphics card and started noticing this: render.jpg
At first I thought it was because of the photoshop effects and the light "hole", but then I turned off some events with the layer object changing the background RGB coefficient and the problem stopped. I tried putting a simple mask (black, semitransparent) on those layers in order to reproduce the darkening effect I had with the RGB coeff, but the bug came back.
Apparently my friend told me about this a few months ago but I thought it was just a problem with his setup or something. I've had several friends test out the build yesterday and it seems that anything newer than a GTX 1060 has this problem, although it manifests in slightly different ways. One person had more perfectly square artifacts, one had more of a stripe pattern.
I thought gif's animated here. Am I doing it wrong?