How to live-stream an alpha video feed from Unreal Engine

The easiest and most powerful way to live-stream an alpha video feed from Unreal Engine
Written by OWL
Updated 6 months ago

You can output Alpha from both the OWL Cinecam and OWL Capture component for live-streaming via the Spout Sender Manager:

  1. In your main toolbar go to 'Edit'>'Project Settings':
  2. In the window that appears, click 'All Settings' and input 'alpha' into the search bar at the top. In the option 'Enable Alpha Channel Support in Post Processing (Experimental)' select 'Allow through tonemapper':
  3. Ensure that you have either an OWL Cinecam or OWL Capture component set up, go to its 'Details' panel and in 'OWL Capture Settings' open 'Alpha Settings':
  4. To only Render specific selected objects from your scene, tick the 'Use Show Only List' and then add the objects you want to show as 'Array elements' either using the drop down list or the picker. In this case, the glowing ball and the platform below it have been selected:
  5. To hide specific objects from your scene, untick the 'Use Show Only List' and then select the objects you want to Hide as 'Array elements' in the same way. In this case, the ball and platform have been hidden:
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