embossing cylinder in the pixel by pixel manner the direct write laser ablation technique eliminates the size limitations of the holographic pattern created on the surface of the embossing cylinder the need to combine smaller images to create a larger shim and the very need to use the shims since large seamless embossing cylinders can be directly pixel by pixel ablated with larger sized images of great variety the polymeric coatings for further direct write laser ablation can be deposited onto the embossing cylinder by various methods including but not limited to molding or coating application_number US 46447306 A description provided in fig1 is an illustrative portion 10 of a seamless substrate of the present invention with enlarged views of diffraction gratings in several pixels 11 18 ablated by interfering laser beams in particular shown in fig1 are diffraction gratings of different pitches a grating pitch can be defined as a distance between the adjacent crests or grooves and different orientations of the grooves or crests relative to some direction each diffraction grating in each pixel is created by interfering two laser beams 19 and 20 on the surface of the seamless substrate as shown in fig2 with regard to pixel 11 the interfering laser beams 19 and 20 form an interference pattern characterized by a number of periodic maxima and minima in the laser intensity with a period pitch d period d is defined by the diffraction equation as d u03bb2 sin u03b8 the intensity maxima have sufficient energy to ablate the material of a.