In my case I want to custom the camera movement path by get oculus rotation. because I tried follow HMD Orientation before and if you put a mesh in front of your camera then turn around camera, u will see the camera’s movement is not just rotation but also have location change.the location change will make my camera move into the airplane mesh while u look down the mesh. I even tried unlink Follow HMD Orientation but it seem like not completed locked the VR device control camera. the camera still can be made a really little rotation and location change.
finally I found this function into the engine"EnablePlayerControllerFollowHmd" it fix the location and rotation change problem but the camera seem like still not be located completed, if try to turn around your VR device u will find u camera is shaking seem like it keep to pull back to current position so it still make my camera keep shaking in the game.
