de Vries, B.Jessurun, A.J.van Wijk, J.J.2015-11-112015-11-1120011017-4656https://doi.org/10.2312/egs.20011001In architectural design 3D modeling in the inception phase is up to now not supported in CAD. Moreover 3D modeling is still far from intuitive with the common interface techniques. This paper introduces a 3D modeling tool for architects, which is limited in its purposes but yet very powerful in its use. A cube is the basic drawing element to construct building masses. Modification of the design is achieved by dragging sets of cubes resulting in the creation or deletion of new cubes.