47266adb$1@news.povray.org...
> Kewl. Faked, but kewl. ;-)  When changing the IOR in an unbiased render 
> automatically makes a spectrum, let me know. ;-)

From what I gather from the Maxwell manual, materials use "full ior" data 
(ior for each wavelength) that are taken into account for dispersion. They 
even talk about a "performance hit" when using these, which must be 
something...

Frankly, the Maxwell demo is free (crippled at 800x600 with a watermark, but 
one can create, save and render scenes), available for Windows 32 or 64 
bits, OSX and Linux, and comes with a few test scenes. Lots of user-made 
materials are also available for free apparently. It's really worth the 
couple of minutes it takes to download it, if only to see how it works, and 
a little test drive would probably answer some of the theoretical questions 
I see in these threads.

G.

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