Darren New a écrit :
> Brian Elliott wrote:
>> Until then, I'd thought that the effects of things down at quantum 
>> dimensions could not be observed so simply at our size.
> 
> Here's another one:
> 
> Go into a place selling polarized sunglasses. Hold up two pairs a few 
> inches apart at right angles. No light comes thru, obviously.
> 
> Now, without moving those glasses, put a third one in between at a 
> 45-degree angle. Suddenly, light comes thru.
> 
> When I see a ray-tracer do *that*, I'll believe in "using physical 
> equations". ;-)
> 

If you are really into that kind of things, there is at least a paper 
about that here:
http://www.cg.tuwien.ac.at/research/publications/2001/wilkie-2001-crp/

So it has been done, just not in a widely known renderer... Perhaps 
because the effect is not so ubiquitous in everyday life yet ;-)

-- 
Vincent

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