My company Molecular Matters launched a new tool called "mFusion" for 3d artists yesterday!
mFusion is a powerful material authoring tool, designed to simplify and boost your texturing workflow.
It lets you: build material layers, tweak their contributions, create different variations, and bake them into textures that work with any game engine and 3d package. If you have a library of standard materials lying around, you can quickly combine & mix their textures using vector masks and mFusion, as if your material was made of several distinct layers like iron, rust, dirt, etc. When you're happy with the result, simply bake it into one single texture map for diffuse, specular, gloss & normal. This lets you work in a layered manner, but use the resulting material in any game engine and 3d package without the heavy run-time cost associated with blending several materials.
mFusion works directly with layers, groups, vector masks and smart objects contained in Adobe® Photoshop® files, so you never have to leave your favorite tool when doing texturing work. The tool directly reads from .psd files, no export steps needed!
Go check it out now, and download the demo version at: