I'm hitting a persistent issue when rendering a garment imported from Marvelous Designer into Cinema 4D using Redshift.

As soon as I enable Tessellation on my Redshift Object tag, strange artifacts appear along the seams: the geometry tears and stretches, creating weird "spikes" or filaments pulling toward the inside.

Here is what I have already tried, but without success:

-Exporting from Marvelous (FBX): Exported as Single Object, Thin, and tried both Weld and Merge Vertex by Proximity (adjusting the tolerance distance to ensure proper welding without breaking the mesh).

-Inside Cinema 4D: Cleaned up the mesh using the Optimize command (in Points mode) to make absolutely sure everything is welded.

https://www.dropbox.com/scl/fi/kswu10cikrbcoryrs3jcw/Tessellation-bug.c4d?rlkey=6z2iws00dhhvz8q2j1e7030hv&st=ca36mkh5&dl=0

https://image.noelshack.com/fichiers/2026/22/1/1779710177-cinema-4d-dqfadphbu4.png

Has anyone encountered this specific bug with Marvelous assets in Redshift, and is there a hidden setting or a workaround to force the geometry to stay glued together during render-time subdivision?

Thanks in advance for your help!