Modeling related to exterior design is the most important process of a product before the sale. Because a structural or aesthetic errors that arises in the external design are important. They can completely eliminate the self-marketing power of the product. If you want to use a mockup design and increase sales, you should revise the themin terms of color, pattern and shape. It is also important to ensure that the exterior design reflects the product correctly. It is also important make it sufficiently, in adequate and interesting way. Then you can make your product more attractive.