Creating realistic materials is one of the most important skills a digital artist can learn - your material makes all the difference between a "wow!" or "meh..." scene. Shader Forge is our longest running series on creating the most widely-used materials with Cycles in Blender. With new lessons added periodically (many of the FREE), this is a course no Blender artist should miss: https://cgcookie.com/course/shader-forge/ | CG Cookie