Many of us in Second Life™ use Blender as our creative tool. Few of us have taken a college course on using Blender, so Blender tutorials are popular. But, it takes a bit of time for the tutorials to catch up with Blender’s latest updates. So, I was happy to come across a rich source of Blender Cycles Materials tutorials. See: Reynante Martinez.
Plus there are a number of handy tips on using Blender. They can make life with Blender nicer.
The main page about Blender Materials is here: Cycles Material Studies. Not all these materials can be used in Second Life. But, it is some pretty impressive materials.