Trigger transition

The One-Way Transition A one-way transition is any transition where you go from the origin map to the destination map, but you cannot return to the origin map. This is the type of transition that usually gives people headaches. Logic would seem to tell you that you don't need a trigger_changelevel in the destination map, just the info_landmark. For some reason, this isn't correct. The destination map must have a trigger_changelevel in it that correctly references the previous map in the New Map Name property, and identifies the info_landmark in the Landmark Name property.

The example map below demonstrates a one-way transition, modeled loosely after the Star Trek teleportation style. The transition is setup like the above displacement transition, except that the trigger_changelevel is a small cube positioned just above the info_landmark (to keep easy track of it), and its "USE Only" flag is set so that it will never accidentally be activated by the player.