Op 18/12/2019 om 00:50 schreef tmelram:
> Hi, I'm trying to create a movie projector and have it project an image onto
> onto other surfaces. I'd also like to have a cone shape volumetric effect for
> the dust in the air near the projector. How would I go about this in POV Ray?
> 
> 

Just thinking aloud, I would suggest to try the following:

1) use a spot light
2) as an image, use a plane/box intersection with an appropriate 
image_map, using some transparency
3) test how this projects upon a white screen (thin box or equivalent); 
probably not good enough (see below)
4) for dust in the air, use an isotropic scattering media

I don't know how this would work out, especially the projection on the 
screen. You might probably need to add/construct a lens with an 
appropriate interior and especially ior.

-- 
Thomas

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