On 30/01/14 12:20, William F Pokorny wrote:
> John & John,
> I believe we found previously that if you render the isosurface NOT
> wrapped in an object, the maximum gradient warning is issued in 3.7. I
> thought the idea was to document this issue, but I admit I lost track.
> 
> When you get warnings it was the case in 3.7, unless running one thread,
> the value might not be the absolute maximum seen because values are
> getting overwritten by differing threads.
> 
> Bill P.

Thanks for that, Bill.

So, John, the thing is to do a test run on your (naked) isosurface
without any CSG operations then, when you've got max_gradient right,
proceed to your full CSG modified scene.

BTW Christoph Hormann has some good information regarding isosurface CSG
in http://www.imagico.de/pov/ic/index.php

John
-- 
Protect the Earth
It was not given to you by your parents
You hold it in trust for your children

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