Learn how to export a texture to the Source engine, the basic way.
Posted by Silverfisk on Dec 19th, 2010
First we create an image and save it as a TGA file in the materialsrc folder for our game of choice. Then we run the TGA file through the program VTEX, this will create a VTF file in the materials folder of the active game in the Source SDK program.
Then we create a VMT file where we specify that we want it to use our newly created VTF file as a texture. Then we start Hammer, find the texture and apply it to a brush!