r.Shadow.Virtual.Clipmap.MinCameraViewportWidth
VarUnreal Engine Var console variable.
rShadowVirtualClipmapMinCameraViewportWidth
Description
If greater than zero, clamps the camera viewport dimensions used to adjust the clipmap resolutionThis can be useful to avoid dynamic resolution indirectly dropping the shadow resolution far too low.
Usage
r.Shadow.Virtual.Clipmap.MinCameraViewportWidth [value]Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.

