r.RHICmd.MaxAccelerationStructureBuildScratchSize
VarUnreal Engine Var console variable.
rRHICmdMaxAccelerationStructureBuildScratchSize
Description
Set the maximum size in bytes of scratch buffer used for acceleration structures build. Setting it to 0 will serialize all builds. (default 2GB)
Usage
r.RHICmd.MaxAccelerationStructureBuildScratchSize [value]Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.

