Abstract: A wall covering having a plurality of panels. The panels are molded to disguise the panel's individuality after installation. The panel's outline is jagged to terminate horizontal and vertical partition lines of the panel's front surface. The partition of the panel's front surface is not aligned with the horizontal and vertical edges of the front surface's outline. The panels are attached to a wall to create a substantially random appearance. This invention is especially suited to create wall covering with the appearance of random ashlar stone layout. Multiple molded panels having different front face partitions may be used to increase the random appearance. Molding the panels is simplified by molding parts of the panel interlock mechanism separately.