You're also going to want to read up on the part about the surface replicator in the manual. If you're into landscapes it can do some neat things. The hair generator can also make grass in a pinch, but it may be a bit more calculation expensive than some other ways of doing things.

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.