The grass looks fine. That's the way it looks when grass comes out through the asphalt. Though I'm wondering... Isn't there some shrub model you can combine together with some sort of trunk/tree model for the trees? The current SCII trees don't look good, and I bet it will take some time until someone makes tree models. Anyway, for now this is one of the best SCII terrains I've seen, keep em coming.