How can I fix material streach?

Development Rendering
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1

Hello, I am having an issue with imported meshes, many meshes when applying material gets streatched and when running the build, it gets dark, It seems to happen when a mesh got some extruded faces, you will find a picture showing the issue. How could I fix the material issue and also the built issue? I tried changing the lod index, the resolution but as for the build, it still get dark.

324943-cap1.png
324943-cap1.png393×888 304 KB

In this meshe, as you can see the bottom part is all good but get stretched on the top half.

324944-cap2.png
324944-cap2.png454×696 284 KB

In the second image, same thing but this is after the build

2

Thanks, but how can I do that? Can I do it in UE4? Could you help?

3

You need to setup UVs. They tell the engine how to show the material on the mesh.

4

It’s a whole thing, and not easy to explain. If you made the meshes in an external package, that would be the place to fix the UVs.

When you extrude the faces, you are stretching the UVs, that’s why it looks weird.