I've written a fairly simple grass macro. I want to use it to coat some
isosurface terrain. Each blade of grass consists of only 3 triangle
objects. The macro works by using trace() at a random x,z position with
each blade of grass. I think I need around 500,000 blades of grass to get a
realistic look. The problem here is that even with 2.1 Ghz and 1 GB of Ram,
I never even get to the rendering step of generating the output image. It
spends about a half hour on the parsing, and then at least 2 more hours on
generating bounding slabs (I quit after that).

I've seen some pictures with some very complicated-looking vegetation, so I
know this can be done. But I'm obviously doing something wrong.

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