Am 21.11.2010 01:08, schrieb MessyBlob:

> To be complete, we'd need RGB triplets for:
> - M: Colour to multiply background by (filter coefficients) first,
> - P: Colour to add: (a) object colour affected by object alpha, and (b)
> emission.
...
> To summarise (and add a few more possibilities), I think this would:
> - give authentic filters (like the "red filter", above);
> - solve the background merging difficulty mentioned by CLipka;
> - cover all the rgb(), rgbt(), rgbf(), and rgbft(); and
> - improve the capabilities over the current rgb[f][t]() by allowing full
> independent RGB specs for object colour, filter colour, and emission colour.

I guess that could work.

The drawback, however, would be...

(1) a lack of file formats to support this complex model, and

(2) a serious increase in image data before file format specific 
handling takes place.

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