first problem: i create a tube as a pathway in my level to let my charater move inside like a tunnel, but the charater keep getting out of the tube at the side and top of the tube when my character go fast.


by the way is there a limit of portal and light space for a level?
or it depend on PC spec?

Do you get out on every block or only on some?
If you get out on every block perhaps your model is too big or your tunnel too small.