The 3-D Model Maker (1) of the present invention is a device that builds three dimensional models of computer generated (e.g. CAD) structures by vector plotting layer-upon-layer applications of solidifiable substances. The layers are formed by expelling minuscule beads of the substances in liquid or flowable phase onto a platform (10) from one or more jets (60), the jets and platform being relatively movable in X, Y and Z coordinate system. The beads are deposited along vectors, during X/Y relative movement, on the platform (10), one at a time, layer-upon-layer, to build the model. The jets (60) and platform (10) are moved relatively to one another in accordance with instructions from the computer (controller) (11) to form each layer in the X-Y plane (in a manner analogous to an X-Y vector plotter) and either the platform (10) or the jets (60) may move in the Z direction to allow the jets to form subsquent layers.