MAYA / why is this happening with normal maps in arnold render

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Hi,
i would like to apply my normal map painted in substance painter  but these jaggy edges happens, why ?
i exported from substance with arnold ai standard surface presets and yet i have these results. Maps are baked hi poly to low poly in substance also.

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Work in progress...

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i want to have these maps as it is in marmoset toolbag. Nice and neat, why is arnold complicated like this.

my normal maps are set to tangent space normals, RAW image flipped G channel and still have this problem

Ruz

isn't that the silhouettte though?, the normal map does not behave like a displacement map. Have you tried hitting 3 inside maya and
smooth it to see if that fixes it.