Hello. I am Reika! I am hosting a Tower of God ONLY event in Korea, summer of 2014.(of course, approved by the original author) and I was wondering if people would like to participate in some way!! We are now looking for artists who can draw posters or ads for the upcoming event and there's more to come! If you'd like to participate, please leave a comment!
Try saving the full image somewhere on your pc. And then set it from there. (had a problem like that once, where just clicking set as background on the web didnt work properly, but saving the image fixed it)