Hi,

Thanks for posting the pictures so we can see what you mean, and for further
describing the problem. Based on this, I somehow think the best method for
doing what you want, is the method you're already using. In other words,
merging the pictures with post-processing. Because this isn't so much
"raytracing" as it is "image composition" that you're trying to do.

If you were trying to get photorealistic results, it would be another story,
and this is probably what POV-Ray is meant for. Having so small stars with
low AA is not going to work. Either you need bigger stars (a few pixels in
size) or else you need high AA.. Personally I would try a combination, for
the sake of realism and beauty. But I can imagine that your goal is
something else.

If it's simply a matter of rendering time, then I ask: Why not use better AA
and save the time you spend on post-processing?  Not that the starfield will
remain exactly like this, but sure they don't have to vanish. To keep the
stars small, make sure they are very strong / intense, and then try this AA:

+AM2 +A0.0 +R2 -J

Regards,
Hugo

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