Why does my spot light + volume fog always have something like a Mosaic

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Why does my spot light + volume fog always have something like a Mosaic and motion blur when changing position

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You should try this command “r.VolumetricFog.GridPixelSize” and “r.VolumetricFog.HistoryMissSupersampleCount”.
GridPixelSize is xy pixel size per cell.(I recommend set to 2)
HistoryMissSupersampleCount is decrease noise when camera pan and camera cut,but increase cost.

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did you find a solution for this? im having the exact same problem but neither of those commands seem to do anything

4

These steps worked for me.

  1. make sure to turn on cast volumetric shadows on whatever light you used.
  2. Type in the console command exactly this “r.VolumetricFog.GridPixelSize 2”
  3. then type in this exactly (warning it is pretty expensive and will use up quite alot of ram) “r.VolumetricFog.GridSizeZ 256” (increse that number if there is still some flicker or jitter.

ALSO, take a look at this post