Problem Converting simple quad mesh .obj to t-spline

[awmetrogolf]

Ive imported a really simple quad mesh .obj from blender which i have done time and time before. For some reason im getting the Mesh to T-spline conversion failed error. I attached the file. Really scratching my head on this. Any suggestions will be greatly appreciated. I attached the file for download.

https://a360.co/2FbOyMp

[adam.helps]

Hi,

I was able to get the same error message. I'm going to dig a bit deeper and see if I can figure out what's going wrong. Do you happen to have the original mesh file that you imported? It might help me figure out what happened.

Sorry for the hassle. It really looks like an embarrassingly easy conversion, so I'm definitely scratching my head at this one.

[awmetrogolf]

Thanks for the reply. I attached the .obj and blender file just so you have both. Its crazy its not converting something so simple. Let me know if you run into any issues downloading them. I tried to attached them using the forum but doesn't seem be working correctly here are the links from Drive.

Blender file

.obj file

[TrippyLighting]

The .obj file does show a mesh, but with sharp edges. If you enter edit mode, select all and then hit CTRL-E and then "Clear sharp" it will import fine into Fusion 360. You'll have to apply the subdivision modifier to see these sharp edges on the mesh.

However, you also have to set units to something else than blender units. Maybe try millimeters and then scale the object to sensible dimensions.

[adam.helps · Accepted solution]

Thanks for providing the original OBJ.

This OBJ file has "unreferenced vertices"--that is, vertices which are part of no face. Perhaps your modeling software (Blender?) is using these unreferenced vertices for some purpose, but Fusion's mesh-to-T-Spline-surface converter doesn't know what to do with them. This is what is causing the failure.

I'll talk to the Fusion team about whether we can be more robust to this kind of geometry; I understand the problem, and I think it would be possible to work around it. In the meantime, you'll need to work around it by exporting cleaner geometry (Peter's suggestion looks good to me).

[awmetrogolf]

You were right. Im not sure why there were additional vertices added. I had created the .svg in AI and imported into blender. Pretty straight forward. Luckily Blender had an option to remove double vertices. I had no idea they were there until you both chimed in. I appreciate all the help. Been trying to figure this out for days now.