Am 20.01.2014 15:52, schrieb Christian Froeschlin:

> I never tried double_illuminate with radiosity, not sure this
> actually has an effect there.

It does work fine. You may need to increase the recursion limit though.

Still, it leaves the problem that ray tracing, even complemented with 
photons and radiosity, can only model linear propagation of 
electromagnetic energy, corresponding to a particle model, leaving /any/ 
effects unaccounted for that arise from the wave-like nature of EM.

Interference is only the most obvious of such effects; a much simpler 
one is the ability of long-wavelength radiation to travel around corners.

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