The document discusses a proposed 3D holographic martial arts teaching tool called the 3D Sensei. It would allow students to view techniques from any angle in slow motion without an instructor present. Community members commented that this would be useful for understanding katas and techniques. The 3D Sensei would use motion capture, spinning mirrors, high-speed projectors, and algorithms to display prerecorded techniques in an interactive 3D hologram. The creator is seeking master instructors to contribute techniques to help expand teaching globally and set the standard for their arts.