Enum EMaskRotationFlags
VRF_NOANGLESTART = 1
VRF_NOANGLEEND = 1 << 1
VRF_NOPITCHSTART = 1 << 2
VRF_NOPITCHEND = 1 << 3
VRF_NOANGLE = VRF_NOANGLESTART|VRF_NOANGLEEND
VRF_NOPITCH = VRF_NOPITCHSTART|VRF_NOPITCHEND