QTVR mainly constructs 3d space and 3d model through still images, and USES this software to synthesize a panoramic image from one captured image. The ordinary three-angle mirror frame can be used in the shooting, but it is difficult to guarantee the movement of the axis, so the whole scene is made with a sense of jumping, not strong authenticity: and with a special tripod, the panorama can be taken out of the axis is very real, the shooting process is not simple. Kaidan, based in the us, now makes tripods for taking pictures.