PatternImage is a pattern design software for stuffed plush toys  and inflatable toys. To design patterns of a toy, firstly, draw seam lines on the surface of a 3D model interactively, then, 2D patterns are automatiaclly developed by flattening 3D patterns, finally, 2D patterns are printed out for making a physical toy. Compared with traditional method of manually designing paper patterns, PatternImage is fast and easy to learn, and resulted patterns have high accuracy. Therefore, PatternImage can be used to improve the efficiency of design, shorten the design period and boost the competitiveness of a toy company.