Unfortunate bug.
Use LC for glossy rays =on
Treat glossy rays as GI rays = Only for GI rays
http://bp2.blogger.com/\_7LwFC3hlGFQ/RuYWCL6ueEI/AAAAAAAAAYU/2t1zTTH5dT8/s1600-h/Use\_LC\_On\_.jpg
Use LC for glossy rays =off
Treat glossy rays as GI rays =Always
http://bp3.blogger.com/\_7LwFC3hlGFQ/RuYWCb6ueFI/AAAAAAAAAYc/0vUdsKYpthE/s1600-h/Use\_LC\_Off\_.jpg
I don’t think it is a bug; you will need to enable Reflective GI caustics for this to work.
The logic is this: you have set the Treat glossy rays as GI rays option to Always. This means that V-Ray will consider glossy rays as though they are GI rays. So when they bounce off the sphere and hit the mirror, V-Ray will figure out that they are GI rays hitting a mirror. These will only be traced if you have Reflective GI caustics enabled.
Best regards,
Vlado
Too many artifacts.
http://bp3.blogger.com/\_7LwFC3hlGFQ/RuYzeb6ueNI/AAAAAAAAAZc/AsNySsBjg90/s1600-h/Use\_LC\_Off\_Caustics\_On.jpg
It’s would be good idea to add option: exclude object or material from “Use light cache for glossy rays”.