You should be able to make any object invisible but still pertain it’s functionality/collision. This is really useful for objects like ladders, notepads, teleporters, and launcher pads, but also has it’s uses for other objects 
Bumping this because I want to add that this would be super useful for Condo IO. I can see myself wanting to make certain things disappear with the press of a button or something similar, and this combined with the existing collision toggle would make that 100% possible to do.