trigger_changelevel Last edited 1 year ago2023-08-02 12:21:07 UTC

trigger_changelevel - Brush Entity

Attributes

• Name (targetname) - Property used to identify entities.
• New map name (map) - The name of the new map to load.
• Landmark name (landmark) - The name of the info_landmark that defines the same point in space in both maps.
• Change Target (changetarget) - The entity name to be triggered in the next map. Works similar to a trigger_auto.
• Delay before change target (changedelay) - Self-explanatory.

Flags

• No Intermission (1) - This flag appears to be unused and has no effect.
• USE Only (2) - Entity can only be triggered by another event.

Notes

• The game must be restarted completely if updates to the level change brushes are made. Not doing so causes incorrect and/or problematic transitions, even if all the change level brushes and entities are properly set up and configured.
• It's recommended to keep your map names short with no capital letters, spaces, or special characters. Instead of "Chapter 3 Level 5", try c3l5 or ch3_lvl5.
• It's recommended to follow the same naming conventions for landmarks - no capital letters or spaces / special characters.
• You must set up changelevels between two maps both ways viz. map1↔map2, even if the player is meant to progress one way. Where players aren't meant to backtrack, place the "return" trigger as a small brush in an unreachable place, with flag 2 (use only) set. Not setting this up properly will crash the game.
• If a trigger_transition is set up with the same name as the info_landmark, the trigger_changelevel can be triggered by other entities. The player will change level if they are inside the trigger_transition when the trigger_changelevel gets triggered. This also meant that the trigger_changelevel can be placed anywhere on the map; the trigger_transition takes care of the affected area.
  • Examples of trigger_transition + out-of-the-way trigger_changelevel setups:
    • Between pre-disaster and post-disaster test chamber, with the "unreachable" trigger_changelevel notoriously exploited in speedruns.
    • Between the Satellite Rocket launchpad and the previous map.
    • Second map of Gonarch's Lair, with a convenient cave-in collapse.

Related pages

• info_landmark
• trigger_transition
• Tutorial: Changing Levels
• VERC: In Depth: Level Transitions