3D CAD & Spatial RLVR Papers

Technical reports and foundational research on ISO-10303-21 B-Rep solid modeling, 3D Computer-Use Agents (CUA), and deterministic geometric RLVR.

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Where Frontier Models Break in 3D Engineering & Spatial CUA: Empirical Evaluation on ISO-128 Blueprints (PDF)

SpacetimeML Research Team

Downloadable Technical Report (STM-TR-2026-01): Empirical evaluation of Claude 4.5 (15.0% Pass@1), GPT-5.2 (10.0%), and Gemini 3 (10.0%) across 20 ISO...

Oct 22, 2026Read paper

Deterministic ISO-10303-21 (.STEP) B-Rep Verification for Reinforcement Learning with Verifiable Rewards (PDF)

SpacetimeML Embodied & Spatial Systems Group

Mathematical specification of verify_step.py: combining 35% Principal-Axis Bounding Box IoU, 25% Closed-Shell Volume/Area conservation, 20% Euler-Poin...

Oct 22, 2026Read paper

Multi-Engineer Part Families (part_family_id) & Zero-Contamination Holdout Architecture for 3D CAD DPO (PDF)

SpacetimeML Research Team

How pairing 2–4 independent human mechanical engineering trajectories per ISO-128 blueprint across SolidWorks and PTC Creo enables Direct Preference O...

Oct 22, 2026Read paper

OSWorld: Benchmarking Multimodal Agents for Open-Ended Tasks in Real Computer Environments

Tianbao Xie, Danyang Zhang, Jixuan Chen& 2 more

Evaluates multimodal Computer-Use Agents (CUA) interacting via native mouse and keyboard actions across desktop operating systems and complex GUI appl...

Apr 10, 2024Read paper

DeepCAD: A Deep Generative Network for Computer-Aided Design Models

Rundi Wu, Chang Xiao, Changxi Zheng& 2 more

Introduces a generative transformer representation over parametric CAD command sequences (sketch loops and extrusions) for 3D solid synthesis.

Aug 17, 2021Read paper

BRepNet: A Topological Message Passing System for Solid Models

Joseph G. Lambourne, Karl D.D. Willis, Pradeep Kumar Jayaraman& 2 more

Defines convolutional message-passing directly over topological Boundary Representation (B-Rep) coedges, faces, and loops exported from parametric CAD...

Apr 5, 2021Read paper

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