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.)

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