Thank you MasterQ,

1: Actually I never heard about those things but I googled LOD quickly. Semms complicatet. Is there a good tutorial or way of how to do it? Espacially I mean how to do something like dirt ways in WoW or streets in a city all in one terrain?

2: I don't really know what you mean... May you give me a simple example or a model?

3: Thanks. Are there some good water (or even grass shaders) in GS8?

All in one thanks for your quick help!