Mesh problem

Hello,

I imported a custom mesh inside UEFN. It looks normal until I add a material to it (even a brand new one, with default values). Any idea please ? I tried rebuild normals, tangeants etc. Thank you

Without material

With any material (even with default values)

Material is Opaque

I’m so lost, thanks for your help

It looks like flipped normals off the top of my head. If you look from underneath is it solid?

No it’s the same from under :frowning:

Here are the normals and tangeants of the mesh. (Here the mesh is good looking because I’m using the Mesh inspector. Every time I get to see the mesh without the material the problem disappear).

Could it be an issue with nanite ?

Maybe check if all vertices are weld properly?