>> OK, first person to figure out *what on earth* I've got POV-Ray to 
>> render here will get... uh... my respect. ;-)
>>
> At least not something modeled after real life.

That's the irony of it... It *is* based on real life. (Although 
admittedly not the laws of optics - which is why it doesn't *look* like 
anything.)

All will be revealed... in a while.

> You have reds, greens and blues, but yellows, purple, cyan and
> other mixed colors are absent. It could be some function defined
> on the complex plane, yet I would not rule out quaternions.
> 
>> Took just under 4 hours.
>>
>> The image appears... noisy. I'm really not sure why...
> 
> can't help you there, I don't know what you did.

There are two possible sources for the noise.

This image is a huge grid of different coloured boxes. Each box object 
is *supposed* to cover exactly 2 pixels. But if the box grid isn't quite 
lined up with the pixel grid (e.g., the camera coordinates are wrong) 
that might make it look noisy.

The other possibility is rounding errors. The image is iteratively 
generated, so such errors would presumably collect quite quickly...

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