Ammar Al-Allak wrote:
> 
> Hello there...
> 
> Can someone give me some help as to how pov ray's scattering works.

Basically, the brightness (emission) of a sample varies based on how much light
it receives; and where the light comes from, in relation to the viewer (except
with isotropic scattering).

> Is it based on phuscally accurate formula ?

What qualifies as physically accurate? Certainly several lighting effects are
not implemented for scattering, or for POV in general. Most are just not worth
the associated performance hit. The scattering formula is not physically
accurate either, its just a statistically close approximation of a kazillion
tiny illuminated particles. Nevertheless, the model is accurate enough for most
practical purposes. Learning to use it is the difficult part.

> Is it wavedependent etc...
> 

Scattering not wavelength dependant. Someone (IIRC Mark Wagner) was working on
this, but I don't know how/if it is coming along.

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg

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