I wanted to hang some photos on the wall and not pay mad money for frames. So I purchased some black card, glue (to stick photos to card) and blue tac (stuff that sticks to the walls). Then designed and printed these. Very happy with how these turned out!

For reference these photo prints are 8x12 inches, and the black card is somewhere in the realm of 1.2-1.5mm thick. You can always put some tack in the gap if your card is a lot thinner than mine. If your card is too thick you'll need to sand it down or adjust the CAD model. You could also use 6x mounts per image too if you like Or 8x mounts. The slot in the mount goes right through for this purpose. It's not just a corner cutout.

So printing this with supports and the bottom on the printer bed is how I went about it. Removing the support from the gap was definitely annoying. I used pliers and a thin screwdriver. Make sure you adjust your support settings so you're getting very little material in there. Otherwise you could try print it on it's side. Or print in two parts and glue together. Let me know how that works if you try it.

If you like my photos I'll be flattered to give you those too if you want to hang them :)