Xpleet,

One of the major problems with the rocks is the geometry itself. Because it is expected that rocks are to be used in EcoSystems and viewed at a distance, there's not enough geometry to render the rocks correctly close up and smoothing artifacts become visible. These artifacts are part of the model and as such are transferred to the texture.

For some reason, I thought one could increase the number of polys on a rock, just like on plants, but I can't find any setting or reference to it. So, I imagine there's not an easy way to do this (anyone?). You might try turning smoothing OFF or set the smoothness to something like 180 degrees to 'help' the artifacts, but there will still be some. Also, you can use bump maps, and especially displacement maps to help offset the artifacts.

IMO, the other 'issue' with rocks, is the default rock textures have too broad a spectrum of colors. This thread here on Rendo talks about creating rocks in TG vs Vue. BTW, the TG renders are a total hack and are actually a composite of one rendering with water and one without, so that the water can appear to be transparent.

TerraPak does not include close-up rock materials, but you can certainly create your own and combine TerraPak materials using the techniques in the 35-page TerraPak e-book.