Orchid XP v7 nous apporta ses lumieres en ce 2007/11/07 16:50:
> Warp wrote:
>> Invisible <voi### [at] devnull> wrote:
>>> Mmm, I wonder if POV-Ray can do this?
>>
>>   Probably not. AFAIK povray has a very specific refraction formula, 
>> which
>> it converts to total internal reflection when needed. I'm all but certain
>> that this formula does not support the concept of negative IOR.
> 
> That was more or less my diagnosis, yes. ;-)
> 
> It's not something any typical implementation would support unless the 
> designer purposely had this in mind, I would think.
> 
> Now negative light sources........ ;-)
And negative colours, and negative diffuse, ambient, filter,  transmit, specular 
and phong.
Why not! Perfectly possible, try it!
Negative light on a negative pigment returns a positive colour.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you think 80s movies have the 
funniest special effects.
Aaron Gage a.k.a Slartibartfast

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