UDIM is not applied.

[??_??0939]

After using UDIM to unwrap UVs in Blender and importing the model into Substance Painter, the UDIM is not applied to the model. How can this be resolved?

Error message
・[Scene 3D] Errors have been found while splitting meshes per UV tile:
・Mesh 'RetopoFlow' has faces in out of bounds UDIM indices: [88,-33].

PC Specs
・OS　Windows 10 Pro 64-bit版
・CPU Intel Core i7-12700KF
GPU NVIDIA GeForce RTX 3060
・RAM 16GB

After using UDIM to unwrap UVs in Blender and importing the model into Substance Painter, the UDIM is not applied to the model. I have checked multiple times to ensure that the UVs are not overlapping across UV tiles, but I couldn't find any overlapping UVs. How can this issue be resolved?

[Cyril Dellenbach]

Hi @??_??0939,

Thank you for the message.

According to the error message, you have UVs hidden in negative space. If you're having trouble finding the problematic UV shell, you can send me the 3D object at cdellenbach@adobe.com with a link to this thread. I'll try to take a closer look as soon as I can.

Best regards,

[??_??0939]

Thank you for your reply. I have sent the model. I look forward to your response.

https://community.adobe.com/t5/substance-3d-painter-discussions/udim-is-not-applied/m-p/15131686#M87...