Can bring ~8% improvements with minimal impact on the quality
I can confirm significant speedups.
Though there's some render differences as well, same darkening happens with both CPU and CUDA. I guess the intersection is no longer watertight?
Benchmarks now render identical, and still faster even if not as much as before. So I'll commit it, thanks!
Intel i7-4790K, Ubuntu Linux
NVidia Titan Xp, Ubuntu Linux