user24899: Ive got the composition, available publically: 


And a green screen of the overlay used given from the Sea of Thieves 'Creator Crew' program.

How can I use this to remove the overlay from the fireplace, and fill in from other frames something passable.

user24627: What you are looking for is called "Chroma Keying".
It works by sampling a color (in either 2D or 3D space, but you don't have to worry about that) and it, simply put, exchanges that color with the alpha channel - thus making the hue transparent. If you're working with Streamlabs OBS, regular OBS, After Effects or something similar, Chroma Keying is built into these programs. For a good result and knowledge about screen mattes, despill and other things to keep in mind while keying, check out the tutorials by andrew kramer.

24899: <p>Ive got the composition, available publically: <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/NsNKVn75ryQ?start=0"></iframe>
            </div></div></p>

<p>And a green screen of the overlay used given from the Sea of Thieves 'Creator Crew' program.</p>

<p><a href="https://i.stack.imgur.com/q7wup.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/q7wup.png" alt="green screen overlay"></a></p>

<p>How can I use this to remove the overlay from the fireplace, and fill in from other frames something passable.</p>
 24627: <p>What you are looking for is called "Chroma Keying".</p>

<p>It works by sampling a color (in either 2D or 3D space, but you don't have to worry about that) and it, simply put, exchanges that color with the alpha channel - thus making the hue transparent. If you're working with Streamlabs OBS, regular OBS, After Effects or something similar, Chroma Keying is built into these programs. For a good result and knowledge about screen mattes, despill and other things to keep in mind while keying, check out the tutorials by andrew kramer.</p>
