Im not sure whether its my GPU failing or if its the Engine. I just Upgraded my project to 4.17 and was playing around with the Volumetric Fog and i encountered this problem:
if I dIsable Volumetric fog the artifacting goes away.
I also have this problem in 4.18
Same here. UE4.21.1, 1080 Ti w/ driver 417.35, using the forward renderer. Just happens at random when I’m flying around the scene or previewing the game. I tried toggling all the ExponentialHeightFog actor parameters, removing all scene lights and postprocessing, but nothing seems to affect it once the inky blackness starts infecting the volume.
Here’s a preliminary answer. tl;dr reduce the v.fog view distance. I only tested this for a few minutes so who knows if the issue will return. I had the volumetric fog view distance parameter set to 400,000 units and could trigger the issue semi-consistently. I reduced it to 200,000 and the issue has yet to resurface. (And to be safe, I now have it set to 100,000. My game is a hovercar driving game where the vehicle travels 10,000 UU/sec, so distance-related parameters often need to be set large.)
