My V-Ray concerns -- please tell me I'm wrong.

[vlado]

@ivaylo.ivanov

Does it has to do with the fact that the GGX shader in many different renderers was not doing fresnel inside the BSDF so it was not taking microfacets into account for the fresnel and so when light is coming at grazing angle like in your image the GGX appear too bright?

Yes.

Now it seems every renderer are correcting this collective mistake and Grant Warwick just told me it’s corrected in the latest V-Ray nightly.It is corrected indeed, and it will be the default behavior starting from the next service pack.

Best regards,
Vlado