> I would like to ask about another issue which does apply to imaging, to a first
> approxiation for a single photon energy the transmission through an object is
> given by
>
> Transmission = exp -(constant * thickness)
>
> Is there a way to set the texture of the objects (cone, sphere, torus) so that
> they attenuate light in this way. Also is it possible to set them up so for red
> light the constant is different to green and blue light.

Yes and yes.

You can use fade_power, fade_distance and fade_color inside an interior 
block for each object.

Post a reply to this message