Finally my good old Nvidia 3Dvision (stereoscopic) shutterglass and 120Hz monitor system is working again in Prepar3DV4.4 and much, much better then in the old FSX versions.
In X-plane11 there is no native support for 3DVision BUT there is a small workaround with Freeware OpenGL3DVision drivers so put these in the sim root and there you go in full stereo 3D...
I'v tried the same trick in Aerofly fs2 but no luck...
In the past there was a fellow simmer who have asked already for 3DVision support in Aerofly fs2 with no luck but I hope the technical guys will look over it again because I have found out that 3DVision is on a Hugh revival since there are 55" TV's with 120Hz support for 3DVision right now and lot of VR users (included myself) are returning to Stereoscopic Nvidia 3DVision due to bad VR experience.