Hard to see the bark texture with the lighting actually (and that's realistic, so it's a good thing). I was referring more to the simplistic, sharp geometry for the trunk and branches themselves. They don't have enough geometry to have natural variations, they're quite straight and angular. This isn't going to be fixed by a setting in TG, you just need a better tree. Look for one of the higher detail "hero" type trees from Xfrog, NWDA, or Silva3D. Something designed to be used in the foreground. It will likely be quite heavy in geometry, 100,000-300,000 polygons or more.
- Oshyan