Tony,
I did just try 1.73.
No cross eye problems at all (just the old clouds issue) did a flight from PAWD to PAHO which are both heavy sceneries i have installed with HD mesh and orthos etc and no cross eyes and no black screen.
HDR on
maximum texture with compression
AA off
FI settings AA 4x
FXAA off
XPlane version 11.0.1.2
I then tried 1.8 with same settings and i just got black screen within 15 seconds.
Tried a few times. Re boot etc. no cross eyes just straight to black screen now
Turned off AA in FI settings and it didnt go black but shortly after takeoff (was brief start and taxi) i got cross eyes.
Always used stock cessna
More than happy to go on team viewer to see whats up if it helps to fix these nasty little bugs.
Am also upgrading to a 1080 ti in next couple of weeks but by all accounts that wont help just yet.
Whats the oculus beta you speak of?
Regards
Chris
MB: Asus Maximus Hero viii | CPU: Intel i7 6700k @ 4.8ghz oc | RAM: 16gb DDR4 @3000 | GPU:GeForce GTX1080ti 11Gb | OS:Win7 x64 | Display: Oculus Rift CV1 | Flight Controls: TM Warthog, Saitek Cessna Yoke+pedals+2 Throttle Quads, Oculus Touch.