msg24_7 is correct, with the proviso that glowing materials must be disabled.

There is no need to remove textures, change material colors, change diffuse or specular values, nor to use a P node in the materials.

There is also a way to do this without turning off lights or even un-glowing materials. A way to do it with NO changes to any prop/figure materials and NO changes to lights. A way to do it with ZERO preparation, other than the DepthCue Atmosphere material.

It involves use of the P node in the DepthCue Atmosphere material. Can you figure it out?

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)