The Face room includes the Texture Variation area, which allows you to create custom head textures from scratch or modify existing textures. To access the Texture Variation area, click the Texture Variation tab in area 2 of the Face room. This area allows you to create and modify textures. Be sure to load/create your texture before using the Texture Variation area.
The Texture Variation area uses parameter dials that function similarly to the dials in the Parameters palette. There are numerous Texture Variation dials allowing you to create a nearly infinite array of facial textures. Simply adjust the dials and see your work in real time.