In the game The Trials, one of the stages has some players complete a puzzle while some spectate live off a surface gui. This is what it looks like:
https://gyazo.com/1baefe6e81b35441ba570bcb98a6120b
https://gyazo.com/911437096758d963c07ac92828cef245
https://gyazo.com/e8f37fa44634db38338287d2e0aa5414
When players in the frame move around, it changes smoothly and it looks as if you were watching a live broadcast off of a TV screen in real life. I’m wondering how you would go about this; my guess is something with viewport frames, however I can’t figure it out. Could anyone help me?