Hololens 2 App using unity build success, deploy success but scene is not rendering

It sounds like you're encountering a common issue when deploying Unity applications to HoloLens 2, where the scene does not render despite the app running without errors. Here are a few troubleshooting steps you can consider:

1. Check Scene Configuration: Ensure that the scene you want to render is set as the startup scene in the Unity Build Settings. You mentioned that the scene is marked as index 0, which is correct, but double-check that it is included in the Scenes In Build list.
2. Verify XR Settings: If you're using the OpenXR or Windows XR plugins, confirm that your project settings are correctly configured to use these pipelines. You can refer to the MRTK documentation for guidance on setting up OpenXR correctly.
3. Check for Missing Components: Make sure that all necessary components and assets are included in your scene. Sometimes, missing scripts or assets can lead to the scene not rendering properly.
4. Test with Holographic Remoting: As a best practice, consider using Holographic Remoting for rapid testing. This allows you to see the scene in real-time on your HoloLens without needing to deploy each time.
5. Review Build and Deployment Settings: Ensure that your build settings in Unity match the requirements for HoloLens 2, including the correct SDK versions and architecture settings. You may need to install the latest Windows SDK if you encounter any version-related issues.
6. Debugging: Utilize the Visual Studio debugger to check for any runtime errors or exceptions that might not be visible in the Unity editor but could affect rendering on the device.

If you've gone through these steps and the issue persists, consider checking the MRTK forums or community for additional insights, as other developers may have faced similar challenges.

References:

• Deploy an MRTK3 project to HoloLens 2
• Building and deploying MRTK to HoloLens 1, HoloLens 2 and WMR headsets (UWP)