Andrew wrote:
> 
> OK, here's an idea, if someone feels up to programming it.  How about
> have a finite speed of light for use in animations?  The clock variable
> would define "time" in the scene, and light would travel outwards at a
> given speed from all the lights in the scene, illuminating things only
> when the light had reached them and had enough time to travel back to
> the camera.  Presumably, one would have to keep track of the distance a
> particular ray would have "travelled", and check if it has had long
> enough to reach the camera.
> 
> This could be used to very interesting effect in animations with a slow
> speed of light.  A room illuminated by a few lights would gradually
> light up, but then any mirrors in the room would begin to light up
> later.  Also, moving objects would appear at different places in
> mirrors.

You can do that with having fade_distance rely on the clock setting.

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