Quote from Corion on November 17, 2007, 1:50 pm

Awesome! I was feeling cheated in the map I'm designing - I thought this behavior was built into the engine with no other work necessary. I'll start using these right away.

Hurricaaane wrote:

I don't understand how it is supposed to work. Here's a screenshot of my issue, is what I'm doing really the use of this entity?

Think about it - if all the bumpers do is try to move the portal to the nearest portal-ble surface, that behavior makes sense. The surface says it's portal-ble, so the bumper isn't really changing anything. Try adding a single metal cube below that device (or other non-portal-ble surface/blocker) and the bumper should work just fine.