Xu, Bian, Wang, Sun and Gao · Agentic Real2Sim

AHa-3D

A tool harness that has GPT-6 Astra (covered in week 36) turn an ordinary indoor video into an editable, interactive Blender scene in five stages: observe, build, verify, interact and deliver. Pi3X recovers cameras and metric geometry, SAM3 segments walls, floors and people, and TSDF fusion builds a reference mesh; a measurement tool sizes objects, RoomKit supplies 251 object and 252 material assets, X-ray overlays and Bullet physics checks catch misplaced objects, and GVHMR reconstructs human motion. The authors report better reconstructions than Astra alone at similar cost and time, shown through side-by-side examples rather than a numeric benchmark, and have only tested it with Astra. Apache-2.0 code, 249 stars, September 2026.