Ray Tracing, Bounding Volume Hierarchy, Bvh, Axis Aligned, Tetrahedron Octahedron.
Full-HD resolution and shot only primary rays with 16 samples per pixel for Teapot and Bunny, and four samples per pixel for Bedroom and Sibenik (my GPU couldn’t take so much more). Tests were conducted on NVIDIA GeForce GTX 970M with one thread per ray and thread group size 16x8x1. Heatmap images