Matija nous illumina en ce 2009-02-09 00:28 -->
> Hello!
> 
> I am trying to make a surface composed of a multilayer. I have made an array of
> bowls and I would like the light from the bottom of the bowls to reflect yellow
> and the light at the sides to reflect blue, as the light incident on the bottom
> hits at a normal angle and the light on the sides at 45 degrees. I have gotten
> some decent result with irid (Iridescence), but not quite correct.
> 
> I was wondering if someone has perhaps written a macro or a function which would
> simulate the effect of reflectance of a multilayer instead of just one thin
> film?
> 
> 
This is not realy a "beginner" thing.

You can try it several ways.
You can use some layered textures, each one including it's own finish.
You can use several copies of the same object, varying the size by a very small 
amount. The outside one been mostly transparent, with some iridescence and 
slight reflection. This require a fairly large max_trace_level an will get 
relatively slow to realy slow.

To my knowlege, there are currently no macro or function to that purpose.

irid simulate a single film. The model is fairly simple and easy to implement.

Multiple films are another story. The end effect depends on the respective ior 
of each layer, the order of the iors, as well as ther thickness. Not all layers 
have the same thickness. The total number of layers can change.
Was the purpose of the multilayers to suppress reflection, or enhance it? For 
just a few wavelength, or a broad spectrum?


-- 
Alain
-------------------------------------------------
Why do psychics have to ask you for your name?

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