ProofMesh
A web-based boolean-operations service for small 3D printing studios, dental labs, and jewelry designers that runs formally-verified union / intersect / subtract on uploaded STL and OBJ files and returns the output mesh alongside a downloadable correctness certificate.
independent 3D printing studios and dental labs handling client-supplied geometry
- Drag-and-drop STL/OBJ upload with instant in-browser preview of both inputs
- Formally-verified boolean kernel running client-side with downloadable PDF receipt
- STL repair diagnostics including self-intersection, non-manifold edges, and degenerate faces
- Shop-facing verification badge embeddable on quotes and invoices
With AI-generated CAD plug-ins now mainstream but increasingly caught making silent geometry errors, small 3D printing studios are openly asking how to prove to clients that a model is correct before sending it to print.
Multiple existing web/desktop tools already serve boolean-ops-on-STL demand (MeshToolkit, MeshProcess, Sculptopa, MeshLib SDK) and the Lean 4 verified CSG HN post gathered 89 pts/39 comments, indicating real practitioner interest in auditable correctness.Show HN: Formally verified 3D CSG: Trust 93 lines spec, not 1000 lines AI code ↗MeshToolkit - Customize your meshes ↗
Boolean-ops tooling is crowded with free browser-based competitors (Sculptopa, MeshToolkit, MeshProcess) and open-source libraries (MeshLib); the formal-verification certificate angle is novel but the underlying capability is commoditized.Sculptopa | Free Meshmixer Alternative ↗MeshProcess Home ↗3D Boolean Operations - MeshLib ↗
Small 3D print studios and even dental labs already pay thousands/year for exocad/3Shape/Materialise Magics and have free browser alternatives for basic boolean ops; the certificate is a 'nice-to-have' trust signal rather than a must-have, making willingness-to-pay weak.Top 10 Best Dental 3D Printer Software (2026 Review) ↗
3D printing and dental CAD are mature, growing verticals with multi-year horizons; formal-verification tooling (Lean/Coq) is also trending upward, though this niche could eventually be absorbed as a feature in incumbents like exocad.Top 10 Best Dental 3D Printing Software | 2026 Edition ↗
The hard part — a Lean 4 formally verified CSG intersection algorithm with a 93-line spec — already exists and was shared on HN, so a web wrapper around it is a tractable build; main remaining work is scaling to large meshes and robust STL/OBJ I/O.A formally verified 3D CSG algorithm in Lean 4 (HN summary) ↗