I've come back to this at last and I'm trying a new approach.
I've generated a texture atlas of 64 128 by 128 images which I want to volume render.
It's not very good at this stage as the only database of stars I could find was limited to 88,000 stars.
I have parsed the stars into a 128 by 128 by 32 array and counted the number of stars in each bin. I have used this value as alpha and grabbed the colour from the standard galaxy rendering to end up with an 8 by 8 array of textures.
Does anybody have a volume renderer that can handle this type of texture atlas before I spend hours writing one and find out the data is rubbish.
Galaxies Part II
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