Updates the instance mask of a ray tracing instance associated with the Renderer passed as argument.
Ray tracing instances in the acceleration structure contain an 8-bit user defined instance mask. The TraceRay() HLSL function has an 8-bit input parameter, InstanceInclusionMask which gets ANDed with the instance mask from any ray tracing instance that is a candidate for intersection during acceleration structure traversal on the GPU. If the result of the AND operation is zero, the intersection is ignored.
Note that building the acceleration structure on the GPU has to be triggered by calling RayTracingAccelerationStructure.Build or CommandBuffer.BuildRayTracingAccelerationStructure.