1. A computer interface system comprising: a. At least one camera operable to create an image of a wand handled by a user, the wand comprising a plurality of features; and b. A processing module operable to receive the created image of the wand and determine the pose of the wand based on the features of the wand, the pose of the wand comprising a position of the wand, an orientation of the wand and a twist of the wand, wherein the determined pose of the wand is used to control a user application; wherein the processing module is operable to determine the pose of the wand based at least on a precision features region; wherein the precision features region comprises a checkerboard pattern; and wherein the checkerboard pattern comprises dots or blurred blobs in centers of checkerboard squares.