//Add First THREE Camera
camera_Main = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 10000);
camera_Main.position.set(-2000, 500, 500); //Set camera position
camera_Main_declared = true; //Checks if camera is declared for animate() function

orbitController_Main = new THREE.OrbitControls(camera_Main, renderer_Main.domElement);
orbitController.maxPolarAngle = Math.PI / 2;
orbitController.enablePan = false;
orbitController.maxDistance = 2800;
orbitController.minDistance = 400;
orbitController.saveState();

//Create Second Camera
camera_RT = new THREE.PerspectiveCamera(35, window.innerWidth / window.innerHeight, -100, -500);
var helper = new THREE.CameraHelper( camera_RT );
scene_Main.add( helper );

orbitController.?????????? // Set camera_RT as default
orbitController.reset(); //Reset camera_RT orbit controls

var oControl_Main = new THREE.OrbitControls(camera_Main, renderer_Main.domElement);
var oControl_RT = new THREE.OrbitControls(camera_RT, renderer_Main.domElement);

// Only main camera is enabled
function enableMain() {
    oControl_Main.enabled = true;
    oControl_RT.enabled = false;
}

// Swap control to RT camera
function enableRT() {
    oControl_Main.enabled = false;
    oControl_RT.enabled = true;
}