Apache wrote:
> 
> Interesting idea! But in what layer would a reflection of a refraction
> belong to?

I think they should be a separate layer.  The whole idea sounds very
interesting but would involve quite significant changes on source level so
it seem a rather large project.

Applications would be things like all kinds of selective blurring, for
example higher quality post processed focal blur (blurring the
reflection/refraction layers separately).

Christoph

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