I think you are mistaken, since pretty much everything behind those red benches seems to be the AR wall, including the windows, the ceiling and that upstairs lounge we curiously never see anyone go up to.
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The camera seemed to move a lot less than previous scenes on that set with the AR Wall. The space background outside the ship was also plain. So, I figured they more likely used traditional green screens behind a swing set on their regular sound stage instead using the AR wall and rendered the backgrounds afterwards.
I assume that if they used the AR Wall, they would have had used more dynamic camera movements or lighting than what was seen in the episode.
I've assumed that the AR Wall is relatively expensive to use, which is why they constructed the engineering/science lab and bar sets.
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