Importons and irradiance particles in Mental Ray... how many of you are using this?

[kmanus]

I'm about to start learning how to implement this to speed up my renders (and possibly improve quality.)

 

Just wondering how many are actually using this technology, and any tips or resources you may have to share.

 

I recently purchased the "Mastering Mental Ray" book which has helped me bring down my render times without a hit to quality, and I'm now on the chapter dedicated to importons and irradiance particles. I'm pretty excited to give it a shot, and am curious about other peoples experiences...