© All Rights ReservedI attempted to make a patina Steampunk postcard after watching SanDee1899's Steampunk Patina background tutorial, but unfortunately my first attempt to duplicate the method digitally didn't work out the way I wanted it to.
Within GIMP, I used GMIC filter GMIC - Contours - Local orientation to create a raised texture on the machine image. I added a layer mask to it, to exclude everything on the layer except for the part that overlaid the original image. I then set the layer mode to Screen, with the original image on the layer beneath it. I added a copper color layer on top of it, with the layer mode set to Burn. I added a drop shadow, and I used a Selection bevel script on the text. The background color was Bump Mapped with a copper texture image.
The vintage machine image is from an Internet search.
The font is Belfast Heavy SF Bold.