[Issue] Volumetric Fog settings changing during play

Development Rendering
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1

I’m using UE 5.7 and have an environment i’ve been building. When i walk around certain areas of the environment the r.VolumetricFog.GridSizeZ and r.VolumetricFog.GridPixelSize are being changed (i can see them in the console as it’s happening). At first i thought it was adjusting to compensate for frame drops but i noticed that when it changes it is causing a 10+ fps framedrop itself.

I don’t have any volumes changing the values and when i manually set them in the level blueprint they still change on their own. I tried creating a completely new scene and copy/pasting everything over thinking maybe it was a level setting but it still does it. I also tried selecting everything and sliding it over afew thousand units vertically and horizontally and it still only happens in a specific area of the world coordinates, not ina specific radius of any actors… It does it during PIE and in a built project. It always changes between the same two values for each.

Any ideas? (screenshot attached)

Thanks in advance.

FogVolumeIssue
FogVolumeIssue791×186 40.8 KB

2

It might be the scalabililty settings that intereferes for some reason (check the result of the command “scalability”), or maybe dynamic screen resolution that is changing due to perf issues detected by the engine at runtime.

3

I looked into that at first but that wasn’t it and it seems to use higher quality values when the heaviest parts of the scene are in view and doesn’t matter where i look it’s always the same coordinates