How to properly expose Normal map input in a material function?

[Suthriel]

@Araklaj

nobody knows what’s up with the normals? Looking at the world normals buffer, it seems the normal map, which can be seen through normal material on the right tree, is not applied properly at all in my vertex blend material rather than being inverted as I originally thought.

As far, as i know, LERPing normals is not the best way to blend them. Instead try this method here for blending, it seems to produce accurate results.

How to blend normal maps in UE4