A: Yes! The Steam version supports Oculus Rift, HTC Vive, and Valve Index via OpenVR. The native VR mode is much smoother than using VorpX. However, you need an RTX 3070 or better for 90 FPS in VR.
The "4D" aspect refers to highly detailed, three-dimensional landscapes that react to your position in real-time. Unlike static photo fields, 4D sceneries allow you to fly a chase view or even circle around mountains with full depth perception. aerofly rc8 download