Actually, everything in the scene (except for the plane in image 2, and
whatever goes on with sky_spheres with a poly_wave) has an ambient value of
0.

I chased the rainbow too, Bob. I adjusted my ambient values to the point
where I didn't see any differences between rad and no-rad renderings. Then,
as I added more complex physical objects to a scene, I would lose control of
light and be forced to adjust every object all over. So, now I just leave
ambient alone. I won't use lens flares, because I had to introduce
ambient_light <1,1,1> to make them work right. Also, one approach on clouds
had to be abandoned because I had adapted high ambient values. Too bad, too.
It was purely texture related.

Anyway, off to render... the animation of this thing.

Grim

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