Allen wrote:
> I've been working on a program for a while that is a color picker.
> Currently it only supports red, green, blue, and transmit, but I would like
> to add filter support as well.  What I need to know is the math used to
> create a preview color from a solid background color and a foreground color
> containing transmit and filter values.  I've looked through the source code
> for POV-Ray, but have some difficulty in understanding some of it.  I would
> greatly appreciate it if anyone could help me out.

There is no real point in "previewing" a filter or transmit value as the 
result does not depend on the color but that what you call the "background", 
which actually means the recursive ray-tracing result color.  BUT, that is 
what you cannot just compute by one simple mathematical formula ...

	Thorsten

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