r.Shadow.WholeSceneShadowCacheMb
VarUnreal Engine Var console variable.
rShadowWholeSceneShadowCacheMb
Description
Amount of memory that can be spent caching whole scene shadows. ShadowMap allocations in a single frame can cause this to be exceeded.
Usage
r.Shadow.WholeSceneShadowCacheMb [value]Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.

