Well, maybe it's because I like to draw/paint but I'd love to see this. My idea is that in addition to being able to use the preselected painting images you could also make your own pixel paintings to decorate your base with. Have a GUI open up when you right click a painting that lets you make your own (or allows you to modify existing ones, like adding a mustache, or more likely, a wang... to another players portrait). Also, maybe make a recipe that lets you make a copy of a painting you've made. I don't know, just spitballing here.
Also, graffiti.
Edit; maybe also require the player to be holding a paintbrush item (stick+dye) when they right click a painting to be able to modify it.
There has to be some limits otherwise it would ruin people's creativity. Like a lower resolution or something which makes it so there cannot be great detail.
Also, graffiti.
Edit; maybe also require the player to be holding a paintbrush item (stick+dye) when they right click a painting to be able to modify it.
Wait for time
In the break of new dawn
We will never meet