The valve wiki has been down pretty much all today, and it looks like its back up with an all new look!
Have a look, I thought this belonged here in the mapping section because this is the one that I mostly go to, and it has lots of valuable mapping things for people to use.
So hopefully now that it has a generally cleaner/easier to read interface people will use it more!
Also to just make this a NEW UPDATE thread, post your favorite article on the wiki that helped you most with mapping! :toot: