Man..just spent around three hours testing P3D and my Rift trying to find a happy medium. What I'm basically trying to determine is whether it is worth me running my Air Hauler 2 campaign in Papua New Guinea while using the Rift or not. So I started looking at P3D settings, FlyInside settings, and an odd and frustrating thing happened.
I was using the Woitape area of scenery to test. My FPS was a stuttering mess and I turned everything down until I just had mesh and overlay type graphics and my FPS was doing great (90 FPS). I can turn a bunch of other stuff up, but the very second I move the Scenery Complexity slider to NORMAL, my FPS tanks to 20-35 and becomes a jittery mess.
It is really odd because just moving that slider one notch up makes ALL of the 3D ground objects appear. But this is the weird part, which took me foreeeeeever to figure out. I can load another airport in that region (like Kokoda) and the slider at NORMAL gives me all the 3D scenery and 90 FPS. To test it further, I started bumping up the rest of the sliders and they had almost no reduction in FPS. But that one airport (Woitapi) must have some scenery object that is causing a problem with my FPS.
So I'll have to figure out that area..but the testing outside of that area makes me think flying it in VR is going to be awesome. The valleys and ORBX scenery is just incredible. The Oculus Rift depth perception really makes you feel like you are getting yourself into trouble when you go into some of the box canyons and you wonder if you can make the turn to get out.. Very immersive stuff (when running at 45/90 FPS in FlyInside..not so much at 25/35..)