> So I'd expect in a scene with no lights and no ambient values I'd get a
pure
> black render, but I can see my objects.  What am I missing?  The scene is
> just a blue sphere and nothing else.

Have you set "ambient_light" in global_settings to 0? And did you set the
ambient in the finish of the objects to 0? If both are the case, then you
should get a pure black image, unless you're using some emitting media.
Otherwise, the ambient-term will take care that an object is never 100%
black (unless the texture is black itself).

You might want to look up "ambient" and "ambient_light" in the docs.

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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