Problem fixed! So, it's been a few years since I've used the software. I've gotten a new computer and decided to reinstall it. When I decided to do a playtest, the map I spawned on turned to water. As if I hadn't edited it at all. Thinking it was just me not knowing how to do things, I started again. This time I would spawn on a separate map and go inside a building. Initial spawn was ok, but when I went into the building I spawned into a water map. I've since fiddled around some more, but don't know what's going wrong. It seems to be something to do with playtesting after editing the map, or moving the spawnpoint. Once the maps turned to water in the playtests, they are turned to water in the editor as well. It doesn't show at first, only once I've moved onto another map and then back to the original. Sometimes the size of the map changes as well. Is there a problem with my software, or am I just being a noob?