[Radiance-general] Light incident direction in function files

[Georg Mischler]

Frank Eggenstein wrote:

> Hi Greg,
>
> thanks for your fast response. The background of my question is, that I
> want to simulate the behavior of holographic optical elements (HOE). They
> operate on the principle of diffraction (showing a similar effect as
> prisms). HOE's offer two possibilities:


Hi Frank,

Radiance doesn't provide enough spectral information, which makes
it nearly impossible to realistically simulate the coloring
effects you're after You already know how to simulate the
quantitative effects of those elements, of course.

If I understand you correctly, then you can't get the results
you'd like to see right now in an efficient manner with Radiance
alone at all.  Ideally, you'd have a forward raytracer (photon
mapping), and a much finer spectral granularity than the RGB
color spaces offers.


-schorsch

-- 
Georg Mischler  --  simulations developer  --  schorsch at schorsch com
+schorsch.com+  --  lighting design tools  --  http://www.schorsch.com/