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You can now tune the alpha values of your assets if youвЂ™d like, but typically donвЂ™t need to. You want to ensure you clear to transparent black (0,0,0,0) instead of opaque black (0,0,0,1).

Unity defaults to clear automatically with the MixedRealityToolkit, but if itвЂ™s a non-Unity app you should modify the color used with ID3D11DeiceContext::ClearRenderTargetView().

Ensure that the app is clearing to transparent black.

Change any content that is showing up as opaque black to have an alpha value of 0.

Setting a background alpha value of one results in a black backgroundД®xpected Result: Holograms appear properly blended with the real-world (expected result if clearing to transparent black) Here are some of the artifacts you might see in MRC if your app isn't clearing to transparent black:Д®xample Failures: Black edges around the content (failing to clear to transparent black)Д®xample Failures: The entire background scene of the hologram appears black. If you're developing in non-Unity, you may need to make a one line change. In Unity, this is done by default with the MixedRealityToolkit. The most important step is to make sure your app is clearing to transparent black instead of clearing to opaque black. MRC uses the hologramвЂ™s alpha channel to blend with the camera imagery MRC is expected to work without additional development effort, but there are a few things to be aware of when providing the best mixed reality capture experience. Learn more about rendering from the PV camera (DirectX).

The right eye in the headset won't be compromised, as it won't be used to render the holograms for the MRC output.

Avoid having an offset at distances other than the focus point as you might see in the default MRC.

Hologram alignment to your physical environment and hands for near interactions should be accurate at all distances.

Render from the PV camera offers the following improvements over the default MRC experience: To ensure the app supports the additional render correctly, the app has to opt in to this functionality. HoloLens 2 adds the ability for an immersive app to render from the PV camera while mixed reality capture is running. If a focus point isn't set, the stabilization plane will default to 2 meters. This ensures the best alignment in both the headset and in mixed reality capture. Immersive apps (on HoloLens) should set the focus point of where they want their stabilization plane to be. This means that holograms outside the focus plane won't align because of the physical distance between the PV camera and the right display. These two sources are combined using the focus point set by the currently running immersive app. Enabling improved alignment for MRC in your appД«y default, mixed reality capture combines the right eye's holographic output with the photo/video (PV) camera. How MRC impacts your app Enabling MRC in your appД«y default, an app doesn't have to do anything to enable users to take mixed reality captures. You can use MRC to demo your app, educate users, encourage users to share their mixed world interactions, and for user research and problem solving. Whether it's mixed reality screenshots on your Microsoft Store page or other users sharing capture content on social networks, Mixed Reality Capture media is often a users first exposure to your app.

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MRC on HoloLens (first-generation) supports videos and photos up to 720p, while MRC on HoloLens 2 supports videos up to 1080p and photos up to 4K resolution. This includes best practices for MRC visual quality and being responsive to system changes while MRCs are being captured.Дevelopers can also seamlessly integrate mixed reality capture and insertion into their apps. You can take a mixed reality capture (MRC) photo or video at any time, but there are few things to keep in mind when developing your application. See Render from the PV camera below for guidance on a new MRC capability for HoloLens 2.

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