Ray Tracing, Bounding Volume Hierarchy, Bvh, Axis Aligned, Tetrahedron Octahedron.
compared to AABB on the first level already. Also, note how the child volumes are not completely enclosed by the parent, but just ‘carve’ a volume out of the parent. Now call me crazy (rightfully so), but I think that with these additions, the AABT is the most interesting route to investigate