Sculpture is a three-dimensional art form that can be created through carving, modeling, construction or assembling materials. There are several types of sculpture, including relief which is attached to a background, sculpture-in-the-round which can be viewed from all angles, assemblage which uses found objects, kinetic/mobile sculptures that move with wind or mechanics, and installations that transform an entire space. Relief sculpture has three forms - low relief with slightly raised figures, high relief with figures projecting over half their depth, and sunken relief which is carved into the background.