Arnold render/ MetaHuman Maps

Development Character & Animation
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Hi.
I have a technical question about Meta Human. I have made a test render of Meta Human in Arnold. The render in Arnold does not look as good as the same character in Unreal. I am mainly concerned with the skin detail. The skin detail in Arnold is done using a normal map.
The character in Unreal has more detail with some facial expressions. It looks like Unreal is using displacement in addition to normal. But in a map like this there isn’t.
Here is an example of animation from Unreal

My question is. How is skin deformation created in Unreal. Is there something like displecment?

If anyone from the Unreal team is reading this I would like to say that there is amazing work. MetaHuman is super anatomical and logical. The animation is a pleasure.

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unreal blends different diffuse textures according to deformation

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image
image1919×1079 330 KB

I have another issue where the texture are fine in the viewport but are not visible in the arnold render at all, not sure what is causing it. I have already relinked all the textures again but no result. Please let me know if there is a definite solution to it. It will be much appreciated.

Thanks

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