How do I get a Stereo Parallax effect?

Hello community,

I have a Powerwall (with head tracker) and would like to create a window into a Virtual World.

I know that I need to use the stereo parallax effect to create a stereoscopic projection.

My problem is that I can only create a vertical parallax, where the projection plane rotates with it.

Is there a plugin or workaround how I can do this:

Thank You!