Spray modeling is a spatial modeling interface in augmented reality, aiming at developing a form gradually in early phase of a product design process. From a designers' perspective, this study analyzed the conventional form creating processes and developed a more intuitive and designer-friendly modeling interface. Based on the understanding of various form-making methods and tools, we suggest the concept of "spray modeling" interface, which adopts a real air spray gun as an input device. It allows the user to create a 3D frame and to spray virtual foam around the frame as in a sculpturing process. As a metaphoric approach for novel modeling interface, spray modeling is expected to be widely applied to human computer interaction research beyond design.

Tools and Methods: Field study, Prototyping (VTK: visualization software), Design workshop for user evaluation