3D billboards create an illusion of depth using different methods. Some make use of stereoscopic imaging, where the left and right eyes of the viewer receive two different images. Other methods include multi-layer content projection, where parts of the image are displayed at various depth levels. Advanced graphics software is usually used to create and animate the 3D models which will be projected onto the billboard surface. These models are then projected on a screen, or a projection-based surface. The end result is a billboard that is visually impressive and captivating