Quote - > Quote - Now... about that "visible aberation" that EnglishBob mentioned...

I've been thinking about that. You don't mind me taking over your project, do you? :D

Chromatic aberration occurs because different colours are refracted by different amounts - so maybe you could fake it by doing three renders, one each for the R, G and B components of the lights used (i.e. turn the other two down to zero). Vary the IOR of your lens for each render, then re-combine. Only the light that's passed through the lens should be different, so the rest of the scene should recombine; if not, then a full-colour rendering will be required along with a little more compositing.

Ah, okay... I think I understand what chromatic aberation is as a phenomenon, from that description.

Thanks EnglishBob :)

Hmmm... it's a tenuous link... but the Hipgnosis, Dark Side of the Moon album cover connection, that has just formed in my mind, would go rather nicely in the scene I'm doing this for actually... if I could pull that in somehow... hmmm....

I wonder if that splitting of RGB and recombining could be done in one shader though?

e.g. color_math add the result of three different Refract nodes (with R, G or B bias set for each Refract node too)... in a single shader...

I wonder...