The VRayPhysicalCamera is based on the Unreal Camera, therefore all features are present and accessible but only some are supported in the current version. TheVRayPhysicalCamera Blueprint Actor is accessible through the Modes panel by searching for VRayPhysicalCamera or from VRayForUnreal > Content > BP > Actors > VRayPhysicalCamera in the Content Browser Tree. Select the Blueprint and drag and drop it in the level.