Part of the OBJ deformed after exporting with Blender, other OBJ viewers see it correctly

Good morning

I’m using Blender 2.79, exporting my model to OBJ+MTL.

All meshes from a single pair of OBJ+MTL files are imported correctly in the scene except one mesh, which is rendered with the material only in the vertices and some weird lines from and to non-connected parts of the mesh.

Other visualizers like “3D Viewer” from Windows and (website) show the model correctly.

This happened after decimating the model to reduce the size and/or applying a material. I’ve already triangulated the model, made sure there wasn’t duplicated vertices and so on.

I also applied a material that works fine with one of the parts of the scene, so I don’t think the material itself is the problem.

Any suggestion?

Thanks in advance.

Does it work if you export to glTF?

You should definitely prefer glTF and not use the outdated OBJ anymore. glTF is the recommended 3D format of three.js.

Notice when using Blender 2.8 you can use a built-in glTF importer/exporter. Older Blender version require a plugin installation.

Thanks, I’ll try this.