@MugenMcFugen This uploader is really missleading. First I read that art need to be 15"x19" 300dpi, however I am sure that apply only to t-shirts. So for Poster I have made this 300dpi, 15" height and 16:9 aspect ration. Final PSD was more than 100MB 0_o. It showed on workshop after ~20 minutes... Thats a bit crazy :D