The standard was set by IKEA Place, but today users demand more: furniture must stand strictly horizontal, cast shadows correctly, interact realistically with room lighting, and not fall through the floor on devices without LiDAR. We have implemented similar projects for clients with catalogs up to 1000 items — and we know every detail. Our 5+ years of experience and over 10 delivered projects guarantee that a sofa won't sink into the floor and a cabinet will align perfectly with the wall.
Problems Without LiDAR
On devices without LiDAR, ARKit relies solely on a monocular image. The error in detecting horizontal planes can reach 10 cm, and object occlusion does not work — virtual furniture always renders over real. LiDAR solves both problems: plane detection accuracy improves to 2 cm (5 times more accurate), and through sceneReconstruction, correct occlusion is enabled. Here's a comparison:
| Parameter | Without LiDAR | With LiDAR |
|---|---|---|
| Plane accuracy | up to 10 cm | up to 2 cm |
| Occlusion | no | yes |
| Placement in low texture | poor | excellent |
| Relocalization time | 5–15 sec | 2–5 sec |
Plane detection accuracy without LiDAR is 5 times worse, which is critical for large furniture — a cabinet may have a noticeable tilt.
Preparing 3D Models for AR: Common Mistakes
This is often an underestimated part of the project. A catalog of 500 items, each as GLTF with correct PBR materials, proper real-world size metadata, and pivot point strictly at the bottom plane of the object.
Typical problems when receiving models from the client:
- Pivot point at object center — a table floats in the air at its center height
- Scale in centimeters instead of meters — a sofa the size of a kitchen
- Textures in separate files (not embedded in GLB) — model loads without textures
- Y-up vs Z-up mismatch — a table lies on its side
Conversion and normalization of the catalog via Blender Python API (batch script) or through Cesium ion / Sketchfab API — depends on catalog scale. ARKit documentation recommends using a consistent coordinate system.
Details on model preparation
For batch processing 500+ files, we use Blender Python API. The script automatically:
- Moves pivot point to the center of the bottom bounding box
- Converts scale to meters (1 unit = 1 meter)
- Converts textures to KTX2 for optimal loading
- Sets correct axis orientation (Y-up)
The result is a GLB catalog ready for import into Xcode or Android Studio.
Placing the Object: From Raycast to Stable Position
The standard pipeline uses ARRaycastQuery, but for furniture there are specifics: objects are large, and the user wants to place them not in the center of the room but against a specific wall. This means:
- Detecting both horizontal and vertical planes simultaneously
- Snapping to walls — the object 'sticks' at a distance of 15 cm from a vertical plane
- Collision detection between objects — two sofas should not overlap
Collision detection in RealityKit — CollisionComponent with ShapeResource.generateBox(size:). ARView.scene.subscribe(to: CollisionEvents.Began.self) — collision event. On intersection — visual red highlight and placement forbidden.
How to Automate the Conversion of 500 Models?
We use a batch script on Blender Python API that processes up to 200 models per hour. This cuts catalog preparation time from weeks to 2–3 days. Time savings — up to 70% compared to manual editing of each model.
Realistic Lighting: Automatic vs Manual
ARWorldTrackingConfiguration.environmentTexturing = .automatic — ARKit builds an HDR environment map from the camera. This works, but with a delay: the first 5–10 seconds the object is lit incorrectly. For a furniture app where the user sees the object immediately after placement — this is noticeable.
Improvement: AREnvironmentProbeAnchor with manual placement in the center of the room. Allows forced update of the environment map on demand (e.g., via a 'refresh lighting' button).
Multi-Object Placement and Scene Saving
The user places several items, wants to save the result and return later. ARSession.getCurrentWorldMap(completionHandler:) — saves the ARWorldMap state with anchors as Data. On next launch: ARWorldTrackingConfiguration.initialWorldMap = savedMap, ARKit relocalizes and restores object positions.
Works only in the same room with sufficient lighting. Relocalization takes 3–15 seconds.
Comparison of saving methods:
| Technology | Platform | Recovery Time | Limitations |
|---|---|---|---|
| ARWorldMap | iOS | 3–15 s | Same room only |
| Cloud Anchors | iOS/Android | 5–30 s | Requires internet |
| Manual position saving | Both | Instant | No real-world anchor |
Screenshot for sharing — ARView.snapshot(saveToHDR:completion:) + UIActivityViewController.
What's Included in the Work
- Preparation and conversion of 3D models (up to 500 items)
- Integration of ARKit (iOS) / ARCore (Android) with plane detection, raycasting, collisions
- Configuration of LiDAR occlusion and scene reconstruction
- Implementation of wall snapping and inter-object collisions
- Scene saving and loading (ARWorldMap / Cloud Anchors)
- Testing on 10+ real devices
- Publishing to App Store and Google Play (documentation, metadata)
- Training the client's team on the toolset
Timelines
Basic single-object placement with plane detection — 5–7 days. Multi-object with collisions, wall snapping, scene saving — 3–5 weeks. LiDAR occlusion support — plus 1 week. Catalog model conversion is estimated separately by volume. Cost is calculated individually based on analysis of your catalog and technical requirements. Contact us for a detailed discussion of your project — we will prepare a technical specification and commercial proposal. Get a consultation right now.







