Sander wrote:
> 
> I like it: the heavy blocks seem to be made by patient stonemasons. Are
> the arcs all in one piece? I didn't see the original. Do you have an
> outside view?
> 

The arcs are just CSG difference of two cylinders.  I have not tried an outside
view, but there is nothing more to see outside except the stripes creating the
breaks in the sunlight and probably making an outside view quite ugly.  

The original is on:

http://www.schunter.etc.tu-bs.de/~chris/pov/tunnel2.jpg


Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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