No filters means that there are no FX filters on the map. FX filters are only present on the Legendary and Mythic DLC maps and they change the look of the entire map.
It means that the filters that change the look of the map aren't on it.(Example: Gloomy, Black + White)
Question answered, nice one guys. I think this can safely be locked. One thing worth noting though, if you download a No Filters map you'll pretty much be ruling use of filters out, so if you're considering them for an aesthetic after touch then I'd say it's worth keeping them. You can set them to spawn at 180 and, annoying as it is to have them spawn in every 3 minutes and have to start a new round, it can be worth it if you think a filter might add something to a map, especially if you're working with Sandbox since filters work so much better (imo at least) :lock: