Am 29.09.2017 um 23:57 schrieb Alain:

>> Here are three workarounds maybe some already used:
>> *roughness in uberpov reflection block
>> *use conserve_energy / albedo + fresnel in reflection block with an
>> explicit ior
> 
> fresnel and metallic reflection are not compatible in the same
> reflection block. You need to layer the fresnel reflection, with a
> totally transparent pigment of course, over the metallic one.
> Also, that won't work if you use any kind of patterned texture.

Actually, `metallic` already includes a fresnel term (even one which is
more realistic for metals than the standard one, which is only realistic
for dielectrics).

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