errion,
Making teleports that are invisible won't be a problem. I have also wanted to have omni-directional teleportation. While this is not literally possible, there is a work-around to give the
illusion of being able to travel back and forth using only one set of teleport pads:
Create two sets of teleports (Ain, Aout; Bin, Bout).
2. Ain and Bin are visible. Aout and Bout are invisible. Place Ain and Bin where you wish the teleports to be in the level. Place Bout in close proximity to Ain, and Aout in close proximity to Bin.
3. When player travels :::::::poof!:::::: he will see the only the single teleport, and will believe that is where he exited. Very convincing illusion.
I hope this helps you in your endeavors.
Thanks,
Seth Black
"...I'm sorry, could you repeat your question a little louder? I'm a trifle deaf in this ear."
- Willie Wonka