I am using Open Brush with my Pico 4 VR headset and have noticed that the AR mode is not functioning correctly. When attempting to enable the Passthrough mode, I only see a black screen instead of the environment through the VR headset's camera.

Here are additional details that may be relevant:

• VR headset model: Pico 4
• VR headset firmware version: 5.5.0
• Open Brush version: 2.2.0 (I have also tested older versions where the issue persists)

Steps to reproduce:

• Start Open Brush and connect the Pico 4 VR headset.
• Go to Open Brush settings and enable the AR mode with Passthrough mode.
• Instead of seeing the environment through the VR headset's camera, I encounter a black screen.

I have tested other applications and confirmed that the camera on my Pico 4 VR headset works properly. Hence, it seems to be a specific issue with Open Brush's AR mode.

I would greatly appreciate any assistance you can provide in resolving this problem. If additional information is required, please let me know.

Thank you!