Material Creation video tutorial

A 2-minute crash-course in custom material creation for the budding environment or texture artist.

Ever wanted to import your images as Source materials? Here’s how!

Official Valve Developer Community tutorial
Reflective materials tutorial

Note: When I say its width and height must be a power of two, I mean 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, or 2048. The width and height do not need to be the same.