Am 10.09.2017 um 15:55 schrieb Stephen:
> A while ago when I was working with df3s. Both Alain and Clipka
> mentioned that df3s use grey levels not three channels of colour.
> Tga2df3.exe creates RGB df3s (The utility Oosawa 4D Volume Viewer, can
> split them using only one of the channels).
> How does PovRay's internal workings handle this, mathematically?
> If PovRay reads a value of (say) <0.5, 0.7, 0.1> what density value
> would it give it?
> Similarly for <0, 0.9, 0> or any other combination of colour components?

To the best of my knowledge, there is no such thing as a RGB DF3, so
you're asking the wrong question.

The right questions should be, "how does tga2df3.exe handle RGB colours
mathematically?" and "how does OOsawa 4D Volume Viewer get colours out
of it?"

I would presume tga2df3.exe uses the greyscale value (or an average of
the channels) from the images; and that OOsawa 4D Volume Viewer
essentially just uses a colour_map-ish system to convert density to colour.

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