"J. Grimbert" wrote:
> b) If sky_sphere is used, how can you have any alpha information ?> I do not understand how it could happen (No ray reach infinity,> they hit the sky_sphere first, hence, I suppose, no transparency> in the alpha channel.)
Rays don't hit sky_spheres - they go to infinity where the sky_sphere is
Background & skysphere are the same thing.
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Bye
Pabs
