Simon de Vet wrote in message <37D58C09.84B9CB72@istar.ca>...
>Derek Zahn wrote:
>> Thanks to Bob and Chris for your help!  In many instances this seems to
do
>> what I want!
>
>The problem with these techniques is that the rust/stains are randomly
located
>(more or less).. doesn't work well for rust on the edge of a car door, or a
>stain below a dripping faucet.
>
>In cases where stains must be precisely located, try an imagemap, or model
>them directly (blobs for rust, maybe...)


Or, for a precisely located stain, try using the "cylinder", "sphere", or
"boxed" patterns with an appropriate amount of turbulence.

Mark

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