During Early Access I drew an image to go along with my big update patches, which were happening roughly every 2-3 weeks.
They aimed to sum up the theme of the update. At the start I was rotoscoping the 3D models of the characters but after I had the main promo image done, I was drawing the characters in a full bodied style.
Most of these were drawn on update day and were the main thing holding up the game update!