Outline shader inverted on one mesh only, could be importing wrong?

[jensyndrome03]

Godot Version

4.3.stable

Question

I have an outline shader that works on literally every mesh in my game. It uses the cull_front mode. For some reason on the ribbon mesh on this character, the outline is inverted.

If I set the shader to cull_back, it works on the ribbon mesh but not on anything else.

I genuinely have no idea why it’s happening and it’s driving me insane. The normals aren’t inverted in blender - inverting them doesn’t fix a thing. Neither does recalculating. I copied the mesh from the character .blend into another file and exported, and when I applied the shader it worked?? Copying the fixed mesh over the ribbon in the character scene also doesn’t work.

I know this isn’t a shader issue, and by the looks of it, it’s not a mesh issue either. What could be causing this??

[jensyndrome03]

More context - flipping normals does this.

Without the shader, the model looks like this. It looks inverted but inverting it fixes nothing.

[Sweatix]

This seems like a modelling issue in Blender. Would you mind attaching a picture of how it looks in Blender (or just the .blend file)? It would be nice to know:

• What the topology of the mesh looks like i.e. a picture of the mesh vertices.
• The orientation of the face normals.

How to show face orientation in Blender

What happens if you increase the vertex density of the mesh (with a subdivision modifier or similar); does it still behave the same?

[jensyndrome03]

The normals are fine, flipping them doesn’t fix the issue either. It only has this issue in Godot.

[qbieshay]

Have you tried disabling LOD? it worked for me sometimes with some mesh weirdness