I am in the beginning phase of a project where I’m thinking of projecting on three walls and the floor in a white-box setup for a dance performance. I have two questions for this: 1) where could I find more information about mapping the video to the four outputs, so that I can create a continuous surface across the cube? Is there an extension that does this already? And 2) what kind of external GPU solutions are people using to drive this kind of stuff? I have a thinkpad t480s with an integrated Intel card, which I suspect will not be enough to drive four screens… I do have a Matrox triplehead lying around that might do the trick for 3 screens, but would it be possible to run the fourth screen from my hdmi port? OS: Arch Linux.