Broken: 2.74 2015-05-29 (buildbot build) hash:1a0c961
Short description of error
SSS rendering on the TitanX is slow, for me it's slower than CPU.
I've got contacted on BA.org by a french user having a TitanX and a Titan Black. On his system the Titan Black is faster than the TitanX on SSS rendering.
I mentioned it because he is also eager to see if there's a solution, and if it could be of any assistance to mention that the Titan Black (Kepler) is faster rendering SSS
than the Titan X (Maxwell) card.
Correct me if I am wrong but it could be that they are using different cuda kernels. sm_50 and sm_52 are for maxwell cards, TitanBlack being kepler is it using sm_35?
anyway happy if someone could investigate if there is a solution.
Exact steps for others to reproduce the error
Just try and render a scene with a SSS material present, on a system with TitanX.
I added a simple .blend scene and two screenshots.