This is my first online kinda tutorial / hint / walk through video. Excuse me for the voice I'm no radio speaker, and the hour was late ;)
Basically I tried to walk you through my 3 favorite renderers (since VRay and Mental are pretty covered, I thought those 3 might be fun). 2 of them utilize GPU power one doesn't. Since GPU rendering is becoming more and more visible on the market those two may come to your attention as worth playing with. What I forgot to mention in the video was that iRay was in version 1.2 and Arion in 2.0.2 - it's important since iRay seems to 'slow down' with higher versions... If it comes to Arion it's worth to mention that version 2.4 is just around the corner and some cool new features (to mention one: g-buffer!!!) will be very soon available (at a very fair price).
If you have any questions about above video please do not hesitate to ask, post, e-mail.
more info: gecko.com.pl/tutorial-renderer-analisis-blob-sphere/