Christoph wrote:
> i am thinking about generating a synthetic ground-truth benchmark image
> for a 3d scanner using povray. therefore i would like to know if and how
> it is possible to simulate a video projector in povray.
> 
> it should be possible to simulate each projector pixel using a spotlight
> and place a lens in front of the array, but that would be extremely
> tedious and probably inaccurate.
> 
> is there a way to project a bitmap onto a scene, ideally with finite
> depth-of-field? after all, a projector is just a reverse camera ...

Depends on what you want. If you want it to look like a reallife projector,
you should probably use one of the suggestions you already got (using a
light and a texture acting as a filter).

If you really want a "reverse camera", use Rune's "illusion" include file:
http://runevision.com/3d/include/illusion.zip

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