Comment by SXX

A lot of OS / GPU / driver combinations dont actually let you setup virtual displays with arbitrary settings. And you might want it for setting streaming with OBS or games streamings via Steam / Parsec / etc.

Some years ago it's kind a worked for me on Linux with Xorg and open source drivers and Windows with Nvidia, but when it comes to MacOS or Windows+AMD or Intel GPU it simply doesn't work that well.