New GI in mental ray directions
Also, if you haven’t had a chance to wander the ARC forums, here’s a little tidbit from Steffen, the project manager for mental ray about the future of Global Illumination in mental ray.
Going forward, what is now called “GI GPU” will be incorporated into a general new GI workflow in mental ray that can be GPU accelerated. It is supposed to be the modern replacement for the collection of various older GI techniques, like FG Map, Irradiance Particles and Importons, and GI Photons. If you have a capable GPU then the compute time can be dramatically reduced.
This means a single GI solution for all your needs in mental ray without the need to combine or tune other options to get the best result. Additionally it will take advantage of an NVIDIA GPU on your machine (if you have one) to drastically decrease your render times locally and/or a similarly equipped render farm.