Meshing Accuracy Degraded After iOS 26.2 Update

Bug Reports
1
  • Platform category: Unity 2022.3.62f2 and Unity 2022.3.62f3
  • Device type & OS version: iOS 26.2
  • ARDK version: 3.15 and 3.17

After updating iPhone devices to iOS 26.2, meshing accuracy has significantly degraded, directly impacting production measurements.
Reconstructed surfaces are systematically offset inward (deeper) compared to their real-world physical positions.

(See attached screenshots for visual comparison.)

Regression Context:

  1. The issue started immediately after upgrading to iOS 26.2.
  2. No project settings were changed at the time of regression.
  3. Prior to iOS 26.2, meshing accuracy was acceptable and stable.
  4. This issue is not related to visual fidelity; it directly affects metric correctness.

Wall_anfas_meshing
Wall_anfas_meshing1168×2153 259 KB

Wall_profile_meshing
Wall_profile_meshing1168×2153 263 KB

This is a production-blocking issue.

We request one of the following:

  1. A fix for the meshing depth regression introduced in iOS 26.2, or

  2. Clear, officially recommended configuration guidelines to achieve measurement-grade meshing accuracy, if the default/sample configuration is not intended for precise measurements.

If additional flags, parameters, or engine-level workarounds are required to restore previous accuracy, please provide explicit instructions.

Bug reproduction steps:

  1. Install the Lightship ARDK Sample Project using default settings.
  2. Deploy the project to an iPhone running iOS 26.2.
  3. Launch the application and open the Meshing Sample Scene.
  4. Slowly scan a flat vertical surface (e.g. a wall) and a horizontal surface (e.g. floor).
  5. Observe the alignment between the generated mesh and the real-world surfaces.