On 1/25/2016 4:37 PM, clipka wrote:
> Think of it this way: If you reduce the density of a gas, you reduce the
> probability that any given light ray hits a gas molecule and is diverted
> from its original direction to a new one: Light en route to the camera
> from the background has less chance of being diverted /away/ from the
> camera, while light en route to anywhere in the scene from a light
> source has less chance of being diverted /towards/ the camera.

I still don't understand why lowering the density of the gas darkens the 
scene more than not having any media at all.


Mike

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