Engineering Case Studies
How frontier AI researchers and mechanical CAD specialists use spacetime-ml/cad-cua and deterministic B-Rep RLVR to build spatial engineering intelligence.
Diagnosing the 85–90% 3D CAD Failure Rate on ISO-128 Blueprints
How our 20-task ISO-128 engineering blueprint benchmark exposed severe non-manifold topology collapse and 3D axis swaps across Claude 4.5 (15.0% Pass@1), GPT-5.2 (10.0%), and Gemini 3 (10.0%).
Eliminating VLM Judge Hallucinations with verify_step.py
Replacing subjective 2D screenshot rewards with deterministic ISO-10303-21 B-Rep parsing across Principal-Axis BBox IoU (35%), Closed-Shell Volume (25%), Euler-Poincaré Topology (20%), and Bore Radius Spectrum (20%).
Behavior Cloning 6-DoF Viewport Orbiting Across 6 CAD Suites
Training multimodal desktop Computer-Use Agents on 62 verified episodes (34,551 privacy-masked PNG frames and 260,203 telemetry events) spanning SolidWorks, PTC Creo, AutoCAD, FreeCAD, Fusion, and Inventor.
9-Pass CPU Vision OCR Scrubbing Across 72,070 Raw CAD Frames
Engineering an automated zero-PII curation pipeline with dynamic foreground window telemetry (82/82 verified bundles) and mandatory Native CAD + .STEP submission gates.
Building 3D CAD or spatial CUA models?
Partner with SpacetimeML for custom multi-suite CAD trajectories and deterministic B-Rep reward harnesses.