screenshot (t.a.g.)

You've enjoyed the list of all the posts that featured a real screenshot.

They usually introduce a new feature in my tools or a significant visual progress in games. Not all of these are pictures taken with a real camera (hopefully), only some are hosted on flickr (and only small size is on the blog) and they are conveniently complemented by videos (mostly screencasts) for more dynamic features.
In contrast, mock ups are made-up pictures (typically featuring Gimp) for things that do not exist yet out of my personnal virtual world (running Mind OS :)