rendering to displays that are not spanned by Windows desktop

[qwerty]

yes, two identical nVidia video cards. one outputs to the screen (2 outputs) and one to the HMD (2 outputs).

BTW, I've managed to run it when all the screens are made into a single horizontal span in nVidia Control Panel - using fullscreen, addWindow, and then window.setSize and setPosition.

Still, for compatibility with other software we use on this machine, I'd rather not span the desktop across all the screens.