To get furniture models from 3d.io into ARKit, export the model in GLTF or OBJ, then convert it to USDZ using Apple’s Reality Converter or command line tools. Make sure the model is optimized—low poly with compressed textures—for best AR performance. Import the USDZ file into your Xcode project and load it with ARKit using ARQuickLookPreviewItem or RealityKit. Test on-device to ensure correct scale and lighting.