This is a huge issue when editing the main map in the modding tools. When you disable the native vista tile set by setting it to none, you are left with a default base layer. You can paint multiple layer on this base layer just fine in the mod tools, but when you load the map in game, only the base layer shows, with none of the painted layers. Also, with the snow.flow map unable to be modified, any main map not shaped like calradia, can only have snow if it is painted on, causing some huge weirdness with custom maps right now