Your First Left 4 Dead Map

This tutorial will cover the basics of Left 4 Dead mapping. It will go in specifics on the entities, the director, weapons and spawns. Do note that it will not be for new mappers: the setting up of hammer and extreme basics are already covered in tutorials.

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Intro Sequences

• logic_choreographed_scene
• point_viewcontrol_survivor
• point_viewcontrol_multiplayer
• env_fade

The initial spawn area

• info_survivor_position
• weapon_first_aid_kit_spawn
• weapon_ammo_spawn
• weapon_smg_spawn
• weapon_pumpshotgun_spawn

The Director

Creating areas for the infected to spawn.

• info_director

Item and Weapon Catches

Setting the flags for random spawn locations

• weapon_molotov_spawn
• weapon_pipe_bomb_spawn
• weapon_pistol_spawn
• weapon_pain_pills_spawn
• weapon_ammo_spawn
• weapon_hunting_rifle_spawn
• weapon_autoshotgun_spawn

Rescue Closets

Bringing dead players back into the game.

• info_survivor_rescue
  • rescueEyePos

Creating Panic Events

Triggering the info_director and summoning the horde.

• info_game_event_proxy
• ambient_generic
• logic_timer

In-game examples

• Car alarms
• Metal detectors

Crescendo Events

Intermediate objectives

• func_button
• filter_activator_team
• info_game_event_proxy

Safe Houses

• prop_door_rotating_checkpoint

Changing between levels inside a campaign

• info_landmark
• info_changelevel

The Finale

Ending the campaign.

Building the NAV mesh

Basic

nav_edit 1

nav_generate

nav_analyze

nav_edit 0

Notes

Doors

Type: prop_door_rotating

Frame Dimensions: width: 56, height: 104

World Model: models/props_doors/doormainmetal01.mdl

FAQ

Common questions and problems

• How do I make the infected spawn?
• Why won't the survivor bots move?
• Why is the molotov fire / Smoker's smoke not visible in-game?
• Why won't my rescue closets work?

Error messages and what they mean

• NAV ERRORS - Map is unplayable!
• Missing nav file for mapname.bsp
• The nav file for mapname.bsp is built from an old version of the map
• Missing Battlefield check found N areas
• WARN: CL4DBasePanel::UpdateProgressBar called outside of level loading, discarded!
• GetGoalArea: Cannot find SPAWN_RESCUE_CLOSET area in FINALE, thus cannot guarantee reachability of goal area.
• GetGoalArea: Cannot find end area - no checkpoint or finale located.
• ComputeFlowDistances: ERROR - Cannot compute flow.

See also

• Left 4 Dead Level Creation
• Navigation Meshes