Hello, I am making a new map and need to know a few things before I finish it. Here is a list of questions: 1. Can I make it so you can walk though a wall? Like the wall is perfectly visible, but it is not solid 2. Can I make it so there is constantly fog a certain distance away from you (of any fog at all) 3. Can I make it so a .wav or .mp3 is always playing throughout the map and loops? That's all I have for now.