So just recently I decided to delve into the world of customizing items... I got a basic idea of how it works, but the problem is that I can't figure out how to customize items from worlds I got from the store. More specifically, I was hoping to customize one of the wallpapers from Dragon Valley, but I can't figure out how to get the items to show up in S3OC :/ and I can't seem to find anything to answer my question...