Vision Pro's killer app: walking through your unbuilt house in VR

Reddit-app developer Christian Selig describes a genuinely useful role for his mostly-idle Vision Pro: previewing a house he and his partner are building at full scale before committing to any of it. Floor-plan PDFs gave him no felt sense of whether a hallway would be cramped or a bedroom sized right, so he rebuilt the plans in Fusion 360 — drawing rooms in 2D, extruding walls, cutting door openings — and then stepped inside them in virtual reality, where the headset’s high-resolution displays and sensor array make it well suited to placing a person convincingly in a rendered space.

Most of the writeup is a practical asset pipeline for furnishing the model so the space reads at human scale rather than like an empty warehouse. He applies Fusion’s built-in wood, stone, and glass textures, pulls furniture from IKEA’s 3D catalog (via a Tampermonkey userscript, since there’s no official download), and grabs miscellaneous objects — appliances, even a car for the garage — from SketchUp’s community 3D Warehouse. The recurring friction is format juggling: GLB and USDZ files have to be converted to OBJ for Fusion to import them cleanly, which he does through a somewhat janky but functional conversion site.

The payoff is a Vision Pro app he ‘vibe coded’ in a single morning with Claude and Codex, named Prospector, that goes beyond just viewing an exported USDZ. It adds game-style controller movement so you can traverse a house larger than your actual room without bumping into walls, a skybox so windows look out onto scenery instead of your living room, and terrain-following that maps your position to elevation changes from a property survey. His framing is the real takeaway: AI-assisted coding lowered the effort enough that a fun, one-off tool worth building for a weekend project actually got built instead of never existing.