Support of RTCore for ray intersection
Currently, MRF does not support ray intersection acceleration provided by RT cores with RTX GPU.
This requires some modifications in the OptiX context creation as well as modifications in handling meshes. See: https://devtalk.nvidia.com/default/topic/1047102/optix/optix-6-0-quot-rtx-acceleration-is-supported-on-maxwell-and-newer-gpus-quot-/