How to create this UE4 Material as a Smart Material.

[StabInTheDarkSoftware]

I am trying to create a smart material that looks the same as the automotive reflector material in the UE4 automotive materials 

example. It uses 2 normal maps layered. One normal map has the reflector pattern and the other normal map is a flat normal

map which creates the look of a layer of smooth clear thick plastic over the top of the pattern. Has anyone had experience creating this

look? 

[StabInTheDarkSoftware]

Forgot to attach my smart material result.

[Tony Nemo]

I might use two models, one over the other and reduced opacity.

[StabInTheDarkSoftware]

Yes, but that's not what is being done in UE4. I guess it is not using the same rendering method as 3D Coat?

[Tony Nemo]

I suppose the two materials are in different layers, have you experimented with the top layer's opacity?

[StabInTheDarkSoftware]

Yes, I run out of ways to experiment.

[Carlosan]

Smart Materials have not fresnel attributes to change, for me looks more as shader work that textures work.

[StabInTheDarkSoftware]

Is there no way to create this PBR texture with 3D Coat smart materials?

[Carlosan]

As you said you need to generate 2 Normal maps inside 3dc to achieve that result.

But Reflectors use fresnel to change angle incidence. That is not possible on 3dcoat atm.

Fresnel is very important when rendering glass. Having full control over the incidence angle for the Fresnel is also important for achieving a convincing falloff.

reference: Using dual normal with clear coat

reference images