I've been running this on /w/ for a short bit now and I'm not quite sure why I haven't shared it here. It's not nearly as creative or hard to do as some of the stuff the rest of the community does, but I figured I might as well share my own little creations.
A Render in Shapes wallpaper is just as the name implies, it's a render in a shape. The community has gotten pretty creative with it, so I recommend checking out the /w/ thread.
Current /w/ thread: https://boards.4chan.org/w/thread/2051368
My Wallhaven: https://alpha.wallhaven.cc/user/seel/uploads
Latest pape I made: