tl;dr: A homeowner-to-be used Apple Vision Pro to walk through their future house in VR by modeling the floor plan in Fusion 360, populating it with free 3D models from IKEA and 3D Warehouse, and exporting to USDZ. They vibe-coded a custom viewer called Prospector (open-sourced on GitHub) that adds controller support, skyboxes, terrain following, and real-world toggling—making it far more useful than static PDFs or their architect's Revit walkthrough for grasping scale and layout.