We all know SXSW is the mecca of music. But what gets you to the show? Usually a visual. Flatstock is a rock poster show featuring original graphic art from more than 80 of the most popular working poster artists today. It's the mecca of visuals as far as music is concerned. In its 24th year, Flatstock coincides with the music conference week of SXSW. Best of all, it's free to the public. No badges, no hassle, no complaints. And if you're an artist or designer, you definitely don't want to miss this event next year.