list the primary materials used in sculpture.; how is casting done in sculpture? what is the lost wax method?; what technique was used to create this sculpture? what materials were used?; what is a natural sculpture? name at least two forms of processes that exist in nature.; what choices do artists make when they create an assemblage? what is the impact of those choices?; which technique of sculpture was used to create the piece of art above?; what is a freestanding sculpture? how many points of view does a freestanding sculpture have?; which sculpture technique is more commonly used by modern artists than by artists in the past?