An image processing method includes capturing an image of the head of a user of a head mountable display device. The position of the head mountable display device is detected in the image captured by a camera. A region of the user's face that is occluded by the head mountable display device is identified. The portion of the captured image corresponding to the head mountable display device is at least partially replaced with a corresponding portion of a 3D facial model, to provide a modified version of the captured image.
