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No. Glossy2 material was written many years ago to replace Glossy material because the lack of energy conservation of the old version.lacilaci wrote: Mon Jun 10, 2019 4:31 am Do higher specular values than default on glossy material break energy conservation? Do they on the new principled shader?
I don't know but I doubt Disney has designed a material without energy conservation in mind.
From what I can see in the paper, only the clearcoat layer breaks energy conservation (a bit):
(emphasis by me)For our clearcoat layer, we use a fixed ior of 1.5, representative of polyurethane, and instead
allow artists to scale the overall strength of the layer using the clearcoat parameter. The normalized
parameter range corresponds to an overall scale of [0, 0.25]. This layer, even though it has a large
visual impact, represents a relatively small amount of energy so we don’t subtract any energy from the
base layer. When set to zero, the clearcoat layer is effectively disabled and incurs no cost.