Yeah, "carving" a material in like that requires the use of a bump map.. which needs to be grayscale. Adding colored "carving" like things to an existing material is kind of tricky.. Play around, with this little trick in mind: You can apply two materials to the same value (diffuse, ambient, etc) by ctrl-clicking in a second channel on the same value... Doing this maps them interestingly, so you'll have to play around with it, but it might manage to get your texture how you want it. =) Rosh