Addicted to CG dives deeper into optimizing your render quality and performance. It complements Blender Guru's recent look at Light Portals.
Addicted to CG writes:
Hi everyone! In this video you will learn what blender light paths are. And mainly about light bounces, what are they used for, when and if you should use them and if they are worth the extra rendering time. Now in this quick introduction to blender's light paths video (I know pretty long title) you will basically see a quick PowerPoint and then proceed to where the settings are located and how to change them. The conclusion of this video of whether you should crank up the light bounces values or not is totally personal although it is based on different renders. So if you have a different opinion than mine be sure to share it with others in the comment section bellow!