In our daily design work, a large number of hand drawings are generated during the brainstorming phase. However, it is not small to achieve the fineness and time-consuming degree of this kind of hand drawing. The above hand drawing is a copy of Mr. Liu Chuankai's hand-painted work. In daily design work, this kind of fine hand drawing with strict perspective is usually replaced by computer-aided design. However, it is undeniable that in the product development stage and in the promotion of product aesthetics, this accurate and fully expressive renderings can attract the eyes of enterprises and product users in the environment of computer renderings. It is an enduring means of design communication, expression and publicity (it is a design communication tool that AI cannot replace).