I’m not sure that I understand what RDP is here for. The last time I did this was around 20 years ago, so there’s some fuzziness to my memory, but I seem to recall that the Xinerama extension separated screens from displays and meant that you could use two different machines with different displays to assemble a single logical screen. There were demos of video walls assembled in this way floating around, with each cluster of displays driven from a separate workstation. I guess you want to do 3D rendering on the fast machine?
I’m not sure that I understand what RDP is here for. The last time I did this was around 20 years ago, so there’s some fuzziness to my memory, but I seem to recall that the Xinerama extension separated screens from displays and meant that you could use two different machines with different displays to assemble a single logical screen. There were demos of video walls assembled in this way floating around, with each cluster of displays driven from a separate workstation. I guess you want to do 3D rendering on the fast machine?
perhaps this is trying to achieve (although partially) – the same recent feature on Macs allowing to extend display to to an iPad
https://support.apple.com/en-us/HT210380