Mike Metheny wrote in message <3726a0b1.0@news.povray.org>...
>Okay, hypothetical I'm thinking of trying.  I create a heightfeild, make a
>nice lil hill.  I wanna use a macro to create a nice field of tall wild
>grasses.  obviously the base of each stalk needs to be just under the
>'ground' or heightfield.  Easy way to do this anyone?
>


The easiest and most flexible way would be to use the trace() function of
the Superpatch. If you want to use official POV, Ken's suggestion is fine,
too. But more difficult from a math point of view.

Margus

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