> > Explanation: LDT is a form to say how much light leaves a
> > luminaire in any direction. The picture shows an example
> > of an direct/indirect luminaire. You see that there is
> > much light going down and  some going up. You also see
> > in which _direction_ goes more the light.
>
> Couldn't you get the same effect by surrounding a point light with a
> small textured sphere or something?

Yes, it is maybe possible to simulate the effect. And also
a nice way for our programm to export scenes without the need
to use a patched version of POVRay. Only thing is to calculate
the fancy mapping for the texture. Also the sphere must not be
visible in the scene? Would that be possible?

Big disadvantage is, that you cannot edit the values in the scene file.

Martin Hellwig
DIAL GmbH
http://www.dial.de

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