The texture choice is very important, Yanick really likes to use basic surface textures and add some paint, mix and color correct with photoshop. He never uses a texture as-is. Some 3d Total Textures are used in this process for the image's creation. This gallery is very complete; for this reason, he used some images from 3D Total for the character.
With some photoshop techniques, Yanick changed the look of the base image.
Some samples of the Darkness Monster's maps. This is part of the head and helmet.