... the film contains a parallel or vertical convex lens. The color image under the convex needs to be technically encrypt-handling with ... . After the special handling, the image is refracted by the convex lines of the lenticular, then we can see the 3D ... , 3d mouse pad, 3d notebook, 3d postcard, 3d puzzle, 3d picture, 3d table mat, 3d ruler, 3d glass, 3d basket, 3d ...