CameraController.cs

// Pan
  if (Input.GetMouseButton(1)) // right click
  {
      // Clamp bounds of *rig*
      positionZ = Input.GetAxis("Mouse X") * moveSpeed;
      positionY = -Input.GetAxis("Mouse Y") * moveSpeed;

      // clamp position
      newPosition.z += positionZ;
      newPosition.y += positionY;
  }
// Change position of camera
  transform.position = cameraBB.ClosestPoint(newPosition);