r.RayTracing.MultiGpuMaskTLAS
VarUnreal Engine Var console variable.
rRayTracingMultiGpuMaskTLAS
Description
For Multi-GPU, controls which GPUs TLAS and material pipeline updates run on. (default = 1 0: Run TLAS and material pipeline updates on all GPUs. Original behavior, which may be useful for debugging 1: Run TLAS and material pipeline updates masked to the active view's GPUs to improve performance. BLAS updates still run on all GPUs.
Usage
r.RayTracing.MultiGpuMaskTLAS [value]Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.

