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Lighting Lines On Mesh

Hey all, I’m getting some ugly lines on one of my meshes when I import it from Maya to UE4.

This is aggravating my as it’s a simple mesh and I’ve done it hundreds of time but this time the problem just won’t go away. My UVs and Lightmap UVs seem fine.

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Mesh attached

Help is appreciated.

Appears to be smoothing groups.

Looks like the smoothing of your mesh is messed up. Also, you have a ton of wasted polygons, when you make a loop to make a window you don’t need to keep it looping around. For example, you can make the corner connect to the corner of the wall rather than having a vertical and horizontal loop.

Checked the mesh. Smoothing groups are fine. You have to reset the normals. I don’t know how it’s done in Maya but in Max I add a EDIT NORMALS modifier, select all normals and click on Reset.

You guys are heroes.

It was the vertex normals. I fixed them by resetting them like Maximum-Dev said. “Set to Face” worked.

I don’t really understand why this happened it’s the first time something like this has happened in hundreds of imports. Smoothing groups, lightmap uvs, or softening normals usually fixes it - I’ve never messed with the vertex normals before.

Thanks!

Ya know, I always thought there would be a more efficient way of doing edge loops.