In the case of more demanding or complex projects, where static images appear inadequate to communicate the total of the concept, animation techniques may offer a wide range of possibilities. With the aid of three dimensional computer graphics and special effects, beautifully polished videos may be created, able to visualize ideas and illustrate presentations. From a complicated architectural model that needs to be presented at its full extent, to the visual effects of an art performance, and from videos of striking realism to such of the most extreme imagination, digital animations certainly constitute an effective medium of any kind of creative expression.