Kirk Andrews wrote:
> I'm trying to use the trace command to plant grass on my Isosurface
> landscape, but I don't want it to "grow" on steep grades.  Is it
> possible to use the slope pattern to control my distribution, or is
> there another way to do this?

You can't use the slope pattern for this, but the trace function can return 
a normal vector which you can evaluate directly, for example by using the 
y-component of the normal vector.

Rune
-- 
http://runevision.com

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