The only thing I dislike about rocks is an update a few weeks ago that made the rock texture look like this:
The ground looks nice with the Normal mapping on.But the rock texture was from before the normal maps implemented.
Can't the normal maps work on rocks and hill rocks like it does on the plain ground and not require that texture full of lines ? And I saw there is a difference of detail when you are a bit more far away, but it works only when u'r far away. You can maybe make those lines to faint away when you are getting closer and probably disappear when your close enough like 2 meters or < 1 meter.