Le 18/11/2011 05:58, Ben a écrit :
> Can POVRay be used to make nearly-accurate-to-physics models for optics beyond
> refraction and reflection... to diffraction, interference, etc.?
> 

Diffraction & interference need notions that are out of the actual
model: accurate set of length-waves (including the spectral
distribution) and phase. At least.

Dispatching a set of length-wave instead of a single rgb would be
possible (it's just a bigger data set, and there are only a few special
case which would turn a single ray in many (such as scene with ior).

Taking into account the phase is a totally different story.

what is in your etc ? Birefringence ? Ray absorption ? Cristal with
effect on the length-waves (such as a blue ray exits as red..) ? Using
Black-light (UV) light sources ?

How deep in non linear optic do you want to dive ?

What is a realistic picture of an Ageratum ? the one identical on rgb
display to the mental picture of your humain brain that your human eye
perceived ? or the one identical to the photo taken by a camera ?

(Ageratum has "blue" flower, but they appears "hot pink" on film: this
happens with many flowers and is known as Ageratum effect in the photo
world. it depends on lighting conditions, film or CDD models...)

> If so, does anyone have examples of setting up objects with whatever settings
> are As Realistic As Possible, minimizing "cheating", understanding that the
> photon model has some limits, accepting that this endeavor will take a Huge
> number of compute cycles, and so on.
> 
The main model of povray is not photon model, it's ray model.
In fact, the model is mainly backward ray tracing. only optional photons
follow the forward ray tracing approach.

-- 
A good Manager will take you
through the forest, no mater what.
A Leader will take time to climb on a
Tree and say 'This is the wrong forest'.

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