Determining Wedge Dimensions via Wire-frame Modeling:

Alternative names for the CSG method, set-theoretic modelling, occur through the way in which primitives are combined by using the operators of set theory.

To find out physical properties or to make pictures, we should be able to combine the properties of the leaves to get the properties of the root by following depth- first tree method. The difficulty of this task depends on the representation in which the leaf objects are stored and on whether a complete representation of the composite object at the tree's root should actually be generated.

In some of the implementations, the primitives are simple solids, such like cubes or spheres, ensuring that all of regularized combinations are valid solids as well. In other of systems, primitives include half-spaces, which themselves are unbounded solids. By using half-spaces introduces a validity problem, since not all combinations generates solids.