Mantra Coat IOR

[NathanVFX 0]

Hi!

I've been trying to replicate something similar to Arnold's coat IOR parameter in Mantra. Ideally I'd like to be able to control how much of a coat layer is visible depending on facing angles without affecting the underlying surface, even if this involves breaking the law of conservation of energy.

Any ideas on where I could start?

 

Thanks,

Nathan 

[NathanVFX 0]

I've found a way to do it! 

There's an index of refraction parameter for the coat only if you jump inside the principled core shader inside the principled shader and locate the coat_reflection (PBR Non-Metallic) shader