Hi Niandji, That's a great tutorial and I'll definately be making use of that technique. Trouble is, what I really need to be able to do for this job is to add a new terrain with a different material onto an existing terrain. It's not just the look of the existing terrain I need to modify but the shape as well. I'm using the terrain editor in an unusual way. I've created a very flat, squarish plateau with a clay texture. It's meant to look like a clay tablet and I'm quite happy with the look of it. I now need to add embossed letters onto the top of the clay tablet and these need to be in the erroded bronze material say. I was going to spray them on using the terrain editor but I can't get them to be the bronze colour without changing the clay tablet from clay to bronze. Any ideas? Thanks. Kevin