does it have to be 1x1 prints tho? looks a bit too blurry
The gravestone bricks use 1x1 aspect ratio prints (not the flats, it's the aspect ratio the 1x4x4 print brick uses)
There are mods that let you apply any print to any print brick, you could use that if you really don't want to use 1x1 prints.
Edit: Oh, the blur is intentional. You're not supposed to be able to read the text below RIP.