So you have this:
![[IMG]](proxy.php?image=http%3A%2F%2Fcommunity.freeriderhd.com%2Fattachments%2F11-png.6605%2F&hash=c2f8ed8a7984d7c0b067bb017799ae2a)
First off, recognize where you have any imperfections / dips / bumps in the hills and try to plan out 'ridges' as to where there would be layers. Try to keep it organic, and keep in mind that you're just mapping it out as to not go overkill. Don't just put them randomly, you want to try and figure out what would make sense for a legitimate geographic feature.
![[IMG]](proxy.php?image=http%3A%2F%2Fcommunity.freeriderhd.com%2Fattachments%2F22-png.6604%2F&hash=df7aa9509f0c7c4a7a006ec46f806949)
Alright, now that you've got the 'layers' in place, it's time to add some grass. Obviously you can draw it however you like, you can make the long or wide or ten feet tall, it really just depends on what you want. I just go with simple brush strokes using the smallest size brush. Add them along the lines, and try not to fall into any patterns or make it look to perfect, you want to space them out in subtle clumps or groupings that are random and sized differently. Don't put blades too close to one anther, you don't want a blob.
![[IMG]](proxy.php?image=http%3A%2F%2Fcommunity.freeriderhd.com%2Fattachments%2F33-png.6606%2F&hash=4ebf7d74a6a65acfe09d939f2392cfed)
Notice how I kept it interesting by making that little ridge a little exposed / textured, almost as if there is some exposed sediment or grass growing on an angle. Also keep in mind that when you erase the guidelines that you can keep certain portions to make it look as though the grass isn't just floating. Tilt the blades of grass with the angle of the hill to make it look a little more wind blown. You don't want every blade of grass standing upright, as that's likely not the case with grass in real life.
![[IMG]](proxy.php?image=http%3A%2F%2Fcommunity.freeriderhd.com%2Fattachments%2F44-png.6607%2F&hash=661841cd4a3d27619956c50bc44d06f6)
Boom! There you have it, grass in areas that make sense, and without looking like you just chose random places to put clumps of it. Don't go overkill, simplicity can be great if you do it correctly! You can add little patches here and there, just remember to put thought into every line!