"Greg M. Johnson" wrote:
> 
> How would one designate (in isosurface lingo):
> 
> 1)  a plane at y=1.000 with its normal 'up'
> 2)  a plane at y=0.999 with its normal 'down'

This isn't technically possible; planes have no thickness, a condition
for which there is no valid function in POV that will render properly
(AFAIK), and they're infinite in two dimensions, which an isosurface's
container can't be.

-- 
Xplo Eristotle
http://start.at/xplosion/

"And then one day you find ten years have got behind you
No one told you when to run, you missed the starting gun"
    -Pink Floyd

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