Jack wrote:
> 
> All the images were assumed_gamma 1.0

Should be no gamma at all.

> (a+b)^c != a^c+b^c ?   The math I get, but I don't understand how this
> relates to compositing.

Just try it. Render a two pass scene with two light sources with
assumed_gamma and do a composite. Then render both sources on
with assumed_gamma. The resulting images are not identical.


_____________
Kari Kivisalo

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