Why would a mirror have angle-dependant reflection?

Grim
Tom Melly wrote:
> "Tim Nikias" <tim### [at] gmxde> wrote in message
> news:3CEC73CF.F75C3AC5@gmx.de...
>
> <snip>
>
> Yeh - IMHO it would be a nightmare to implement unless it was
> possible to return the reflection component, etc. of a point.
>
> Without this, any scene where you wanted to simulate a laser bouncing
> around would require a very complex setup.

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