Steam VR - Split Screen without Oculus or Vive

1 user has voted.

Hi everybody!

I'm working on my own VR headmounted display.
I have a 2560x1440p 5.5" Display with HDMI input as a screen.
In the old versions of WOD you could choose VR mode and had a split screen on any display/monitor...
But now Steam needs to recognize Oculus or Vive to show the split screen, which sucks.

Can anybody explain how to get the split screen back?