I posted on this before, but the thread seems to have vanished. My problem was with a large interior, where all the distant walls had a strong blue cast even though there was nothing blue in the atmosphere model.

I finally found the problem after much experimentation, but I should have guessed it. It was nothing to do with the atmosphere, it was the model geometry. I discovered that moving the camera around caused the blueness to flip on and off. If the camera was within a certain volume, the blueness would be present, but outside that the atmosphere would render correctly. I should have guessed because I've seen that effect before if the camera is within a Vue boolean subtraction volume, but I didn't expect it with an imported Poser model.

That's good to know.  Wonder if the imported model was created with booleans or maybe has some normals flipped?

Peggy

More likely the former. The author of the model was Ratracer, who is a respected vendor here.

Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=1632807

One possible source of blueness comes from an indirect effect of the transparency settings.

It looks like the inside of a mesh is affected by the color variations of transparency settings of the material used on the mesh itself.

Try this :

• place your camera where you see that blue effect
• edit the material of your cube (or whatever you are at the interior of)
• set the color decay to black both for deep and shallow settings (I can't remember the exact name of the settiing but they are the only two color swatches on the transparency menu)

Let me know if that improves your problem.