BVH Benchmarks v2 classroom BVH2 knl classroom BVH4 knl classroom BVH8 knl classroom EMBREE knl fishy cat BVH2 knl fishy cat BVH4 knl fishy cat BVH8 knl fishy cat EMBREE knl koro BVH2 knl koro BVH4 knl koro BVH8 knl koro EMBREE knl pavillon barcelone BVH2 knl pavillon barcelone BVH8 knl pavillon barcelone BVH4 knl pavillon barcelone EMBREE knl