Am 31.03.2016 um 19:27 schrieb clipka:

> In a totally strict sense, diffuse reflection is the effect that light
> hitting a surface bounces off in a direction that is entirely
> independent of the angle of incidence. There is essentially just one
> manner in which this can happen, and it is perfectly described by the
> so-called Lambertian model, which is what POV-Ray uses.

I think I wrote nonsense there.

Also, a few more notes:

- My implementation of the Oren-Nayar model turns out to be bugged.

- The mix of Lommel-Seeliger and Lambert is also known as "Lunar-Lambert".

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