William F Pokorny <ano### [at] anonymousorg> wrote:

>
> In trying to verify the media attenuation apart from the scattering I
> set up a simpler scene with with two renders - light in at top, light
> out at bottom. The attached image shows the difference at bottom...

I didn't think to try that simple image-differencing trick. I'll re-render some
images and test them in Photoshop, to double-check my theories.

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