I did a poster for Mastodon on this tour, and i did see this. Totimoshi was selling it at their merch table, the Mastodon merch manager mentioned it to me as was upset as they weren't supposed to have had the poster. It looked to be (poorly) inkjet printed and maybe glued to foamboard. Having said that, the Mastodon merch manager was slightly upset with me as well as i arranged the Mastodon poster with the band+Tour manager directly and none of the above bothered to tell the merch manager. Seems like communication across all parties was not so great on this tour!