People fixing 3D scans for printing bounce between Meshmixer and 3D Builder (both abandoned), MeshLab and slicer auto-repair, which 'often fails.' Agents asked to do it cannot tell if a mesh is watertight, cannot see the result, and 'often stop halfway.'
From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.