clipka <ano### [at] anonymousorg> wrote:
> Am 12.02.2013 01:05, schrieb Cousin Ricky:
>
> >> Quiz:
> >>
> >> One of these spheres is physically wrong. Can you spot the problem?
> >
> > The one on the right looks like it reflects the sky more realistically.
> >
> > I have long noticed that conserve_energy does not have any effect on opaque
> > objects, although that seemed strange to me.  Shouldn't whatever light that is
> > reflected by the Fresnel effect not be reflected by other means?  So I'm going
> > to guess that the left sphere is Fresnel reflection as of 3.7.RC6, and you're
> > applying conserve_energy to Fresnel reflection on the right sphere.
>
> You absolutely nailed it. Not much more to say about it actually.
> (Except maybe that I'm still cheating: I'm only attenuating the
> /outgoing/ diffuse light, depending on the angle to the camera. To
> /really/ do it right, I would also have to attenuate the /incoming/
> light, depending on the angle to the light source; but that would
> require deeper changes to the existing code.)

you know, this is one of those occasions when you know you're so used to CG that
you are tricked into believing the CG image is the correct one.  I really
thought
a shiny ball ought to have that bright sheen outside... :p

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