Hello, I have a few questions that might seem unrelated, but it is for a secret surprise that I don't want to reveal yet (oooh). First Question: Is it possible to have some sort of brush that would allow players to walk through, but not func_physboxes? Second Question: Is it at all possible to allow zero friction between a player and a door? For example, I want a player to stand on a horizontally faced door (like a platform), but at random times, I want the platform to disappear (the door opens really fast). It does give the effect of a disappearing platform, but the only problem is that a player will travel extremely fast with the door until it hits a wall or something which makes the player fall. I do want the player to fall (the point of a disappearing platform), but I don't want the player to slide with it. Third Question: with regards to func_movelinear, I was trying to use it properly, but I couldn't get it to work. I looked it up on the TF2 Wiki, and it said it had bugs with parenting it. So I removed the children it had, but I still couldn't get it to work. Could someone tell me where I could get a tutorial on func_movelinears? That is all... for now, Frogger EDIT: I found a good answer to number 3. Still need help with 1 and 2 though.