Quote: "WIP means that the aim is to create a game, not just screenshots, right?"
Well, in this case, (unless I'm overlooking something), Zay has stated in the first thread specifically;
Quote: "this will now be the place for various FPSC pictures,just for the heck of it "
But, yes, "Work in Progress", for the most part, refers to a game in-development. However, screenshots are, in fact, a part of the development process when the developer is using them to obtain communiuty feedback on his level design, entity placement, environments, and so on. Things to add, things to take away, things to consider, etc; suggestions that will all be taken into consideration and
eventually become the final product; a built game. And even if they aren't intended for feedback, they are still showing the progression of the project, as this board intends.
In short, posting screenshots for feedback can be an essential
part of the development proceess (and the primary purpose of this board). It should also signify that the work is still,
in progress, and not a finished, built game. If you want to see images of the final product, or play a demo that's managed to avoid the dreaded build game curse, I would suggest looking in the showcase board, and not here, where all of the works are still, expectedly; "in progress"
Quote: "About one third of all WIP threads end with "Blablabla can't build blablabla error blabla"...and that means that ALL the development time was wasted. "
Unfortunately, squishing bugs, errors, illegal mesh lines, so on and so forth, are also a stage in the development process (ask any programmer

). But rather than giving up on it, finding a work around for the problem(s) or a solution for them altogether (you mentioned one of Wolf's projects earlier, and if you look
here, he has done just that), is all just part of the process.
EDIT: I would also like to add; even if a project is never finished, the developer can still proudly say that he has gotten more accomplished than nothing at all. Sure, his game will never see the light of day, but you can't take away the experience he's earned working on it. Which will reflect in his future projects.
Kravenwolf