Nope, this was done in Max, but you can do it in UED for instance. It's basically giving vertices color information that is then multiplied with the texture (I guess you could use different blending modes too, depends on the engine) There's a Wiki article about this too…
And that someone was me! Yeah, for something like this which is constructed out of multiple distinct shapes lumped together, I'd certainly start it out as seperate pieces, and merge it later to work on the shape as a whole. It's just so much easier to work on the planes of each seperate bit, without running the risk of…
I've noticed that the Xoliul shader tends to make things look slightly metallic. I actually have no spec on those rocks. Might be my lights. And yeah, it is indeed done in Mudbox, and no! I doesn't tile. I was just doing a quick sculpt. Basically, I just wanted to practice my planar sculpting. Basically, I "drew" (small…