Update (2020): You can submit your graphical oopsies to the Glitch Gallery! An awesome project where graphics programmers can present their finest work as True Art(tm).
I was browsing through an old folder with screenshots from my graphics work, and found some render fails I encountered when haphazardly programming. (Results that make you go: “Interesting, but WRONG”).
(Yes, the name of my experimental voxel renderer was “Voxelicious” at one point.)