Shading issue with Mesh - UE4

Lunar_Crusader

Hey guys I'm still pretty new to UE4 and I've been trying to troubleshoot this issue I've been having but can't seem to figure out what is going on here.

On certain parts of my mesh I seem to get incorrect shading happening? I've checked the UV's and lightmaps and from what I can tell everything seems to be okay. No inverted faces. What's weird is if I rotate these meshes 180 degrees, what was shading incorrectly before is now shading fine and vice versa.

In the photos I've attached I have only moved the bottom mesh but the same issue applies the the mesh above as well. Have any of you ran into this issue or hopefully know whats happening?

CharacterCarl

Have you tried changing the Normal Import Method under the Import settings? Might help with isolating the issue. By default it is set to Compute Normals as far as I know. But usually you want to import the normals instead of recomputing them.

Lunar_Crusader

Nope I have it set to Import Normals and Tangents.

cupsster

Check for double faces and rouge vertices.

Lunar_Crusader

Sadly no that wasn't it either. I went back and double checked and everything seems fine. I'm going to try baking out my maps through xNormal rather than through Substance Painter 2 and see if that fixes the issue.

Lunar_Crusader

Okay well I figured it out. Turns out if I rotated the UV shells where I was having this issue 180 degrees (not flipping it) It fixed the issue? Never have I had this problem before. Usually when laying out my UV's I tend to stick them where it fits and everything works out great. I'd be interested to know why this happens if anyone knows?

Obscura

Have you tried the "import tangents and normals" in the import dialogue? By default its set to compute.