> 
> [...]
> 
> like a Glass throuh which i can look only through one direction
> I need it for the following:
> 
> I stand at a point and look out through something like a window.
> I want to see everything outside the window.
> I also want to see if a spotlight from inside illuminates something
> outside the window.
> But if a spotlight outside the window points at my window, it mustn't
> illuminate anything in my room.
> Is such a thing possible?
> And how?

You could try megapov's 'interior_texture' feature

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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