Building sand table model, sand table model of real estate, urban planning model, house model, house model, villa model, SKP model, 3d max models, industrial models, military model making, marine modeling, aircraft modeling, model boats, mechanical models, industrial models model design and production. Such model is a more complex model of comprehensive physical, technical demanding. Both have the exact structure size, but also to match the shape within a coordinated and have the new product corresponding physical and mechanical properties, the man-machine relationship for simulation tests or performance, as well as to show the look and feel and other decorative features. Such models can be one person or several people in collaboration, using a variety of finishing means refined. ? (1) Preparation? Carefully conceived plan validation, optimization from a number of programs in the best design, determine the outer geometry marked image size, according to map out formal renderings. Parts diagrams and assembly diagrams proposed modeling requirements. Material selection is necessary to meet its performance requirements, but also to adapt to the process needs, and there is strong resistance simulation. Ten production of high-end models, more involved processing tools and equipment, as described in the previous section already, should be chosen according to need. ? (2) the production steps? Structure and function. Display prototype model is a particular material, the specific functional and aesthetic design, the specific process detailed factual manifested, so demanding, highly technical, requiring precision machining, exquisite craftsmanship, excellent selection. The one difference is that the specific requirements vary to focus on its process of manufacture and the several similar.