Strange dark areas appearing on character

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Hey there! Has anyone encountered strange “shadows” like this on their character meshes before? I think my project may be bugged, as it’s affecting the same mesh in multiple levels with different lighting. I thought it was a SSS thing as it looks like it’s somehow playing with the SSS map but i’ve removed everything from the character material apart from diffuse and it does the same thing.

Very bizzare. Thanks for any help.

Ah ha! Fixed by a community member from Discord.

In case anyone has a problem with this the answer lies in the vertex normals of the mesh.