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[4.17] Volumetric Fog Artifacting Bug?

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:

alt text if I dIsable Volumetric fog the artifacting goes away.

Product Version: UE 4.17
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asked Aug 15 '17 at 10:40 PM in Using UE4

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Iby
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avatar image Skifree Jan 12 '18 at 10:46 PM

I also have this problem in 4.18

avatar image seanny Jan 05 '19 at 02:13 PM

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.

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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.)

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answered Jan 05 '19 at 02:41 PM

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seanny
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