I know, double post, but I have just experienced this myself. I mean the EXACT same thing. I was on the same server, walked up to the same house, th exact moment I backed up a little to get the full view, BAM, Artifacts :( all over, so horrible. I think it may have something to do with the server, as well as the other causes. Damnit, just when I think "hey, it's the house from shocklinks topic," it happens.