Spent half a day so far getting my head around MonoGame, which I haven’t used before. Obvious first choice for a project, a terrain generator with very simple graphics. Non-obvious continuation of this, adding a two pass shader that outlines edges and some basic colouring. Code is available on Github, messy as it is.
Just for fun for @McFunkypants on Twitter (I would embed the tweet, but WordPress is being a piece of shit as usual), made a simple sepia colour shader, sort of map-like.