I've been adding anti aliasing support back into the Windows graphics backend and thought I would take a screenshot of the difference it can make. The following image is increased by 300% to show off the anti aliasing more clearly.
Quite a difference isn't it? The lines on the world are actually the editing grid, a feature I added to help make alignment a bit easier. You can disable them. As to why there was no app based anti aliasing for a few versions (even though there was an option it didn't work), when I got rid of SDL and coded my own input and video backends I just didn't implement anti aliasing testing. Which is more complicated than merely toggling a switch like people may think.
Also sort of visible in this screenshot is the new "distance fog" I added. Basically if something is further away it becomes more "hazier" .