Hello,
I’m dealing with exact problem and I was wondering how you fixed ? Or did you find a solution at all? We have a skeletal mesh, it’s a vehicle like yours for all intents and purposes, and we fix the camera to a socket. 4.5.1 everything worked fine in VR, but now when we yaw our vehicle the double image occurs. The easiest repro is just start the map, yaw at 0 and it renders nice and clean, but as the root object is yawing the double image gets worse and worse. It appears, as you have said, that the IPD distance is growing with the rotation somehow.
Anyone else seeing ? In vehicle first person cams? Cockpit cams?
Also i should mention the camera we’re using is parented to a spring arm, which is parented to a bone in our skeletal mesh. UsePawnCameraRotation is set to true and our Pawn::GetViewRotation() function just returns the rotation from GetControlRotation()