Hi there,

I've uploaded another free material on BlendSwap:

http://www.blendswap.com/blends/architecture/stone-dark-tiles/

This is the same stone I've used in my last project (see below). It uses two different UV channels for diffuse and displacement, just open blend file and you'll see it.

In order to reset all UVs in the displacement channel, I used this useful command via python console:

• bpy.ops.uv.reset()

Just select all polys and type this to get all vertices disposed in your UV/editor.

This is a render preview:

I hope you'll find this useful and interesting as it is for me!
Textures are packed with blend file.

Pietro