Working with Textures and Materials - Mastering Blender - page 87

Figure 2-42 The final color texture
Your next mission is to duplicate the layer you have created and transform it into the bump map texture for
the new material:
1. Duplicate the layer by clicking the Duplicate Layer button shown in Figure 2-43 . Rename the new
layer no-seam-bump . This layer will become the bump map texture for the metal material.