Jaime Vives Piqueres wrote:
>
> I've no idea on how to relate light
> intensity to POV-Ray light_sources... 

You are free to choose any units and then interpret the results
based on this decision. Just remember that pov outputs only
integer values (0-1) so you will have to choose a scene dependant
scale factor to prevent overflows.

> and of course I don't understand
> your point about using alpha channel for that.

Or you can use the transmit channel of a pigment if the data
is red in and interpolated within pov script. I don't know
any other way to control the radiation distribution of a light
source. There was a patch for light sources which did essentially
the same thing.


_____________
Kari Kivisalo

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