C03 MTL Metal Plaque sign. C03MTL is a special collection of metallic-based mockups, intended to be used with engraving/embossed artwork. While they can be used as normal mockups with photos and more complex artwork, the recommended use is in the first scenario. Within the .psd file, you can control the size and softness of the embossing in the Artwork depending on how large the ink strokes are. If you choose to use it as a normal, colored, mockup, please disable embossing altogether.