Through the arrangement in different directions, the color difference of similar pixels formed by the refraction of light by lines can clearly see the four rings at one angle and integrate with the background pixels at another angle.  Pic 1.Irregular shape, mirror lines  according to the design Angle  and the perfect combination of  grain ；Pic 2.Gradient mirror lines and  grain pattern combination ；   A combination of particles and mirror lines        Grain pattern       Combination of gradient mirror lines and grain patterns       Irregular shape, perfect combination of mirror lines and particles according to the design angle       Combination of lines and particles      OPTICAL PATTERN ： Universality：According to the product ma...