MRTK will handle specific camera settings automatically, based on the configuration in the camera system profile.
Namespace: Microsoft.MixedReality.Toolkit.CameraSystem
Type: MixedRealityCameraSystem
To check the camera's opaqueness, the MixedRealityCamera system has an IsOpaque property.
CoreServices.CameraSystem.IsOpaque;Namespace: UnityEngine.XR
Type: XRDisplaySubsystem
You can use script code to determine at runtime whether the headset is immersive or holographic by checking displayOpaque on the actively running XRDisplaySubsystem.
Namespace: UnityEngine.XR.WSA
Type: HolographicSettings
You can use script code to determine at runtime whether the headset is immersive or holographic by checking HolographicSettings.IsDisplayOpaque.