I have made grass "forest" files in the past but was quickly shot down by Ben S for performance reasons beyond my comprehension. He said that while it could be done, it becomes performance prohibitive quickly, which I have seen myself. Of course I was practically creating a high density cornfield so it was no surprise. Anyhow, the result of that conversation was that In the future, we would look into grass type files similar to for files that was more performance friendly.