visual overhaul and other minor improvements to map 3 + updated icons for the first 3 chapters

-adjusted the background buildings in the skybox so that you can't see under them when the lightning flashes
-adjusted the position of the fire barrel on the field to prevent survivors from leaving the battlefield area
-replaced the default sewer water texture with it's L4D1 counterpart for a more pleasing look
-increased the area that prohibits tanks and witches spawning slightly in the stadium
-removed a blocklight brush from the decontamination booth for more immersion
-fixed a light in the stadium stairwell that wasn't shining properly on the ground
-fixed a section of displacement that wasn't connected properly in the sewer
-turned off one of the stadium stairwell ceiling lights for a more pleasing look
-replaced a fence prop with a trash can prop outside the stadium stairwell
-moved a power box near the start of the sewer for a more pleasing look
-increased the far z clip plane to fix some graphical issues at a distance
-simplified the brushwork on a few counter tops for better optimization
-replaced the displacement ground on the field to fix lighting issues
-fixed the windows on the stadium being invisible from the outside
-added the missing drip effect to some ceiling pipes in the sewer
-added some blood and a new corpse to the stadium stairwell
-blocked off the underground tunnel doors with some props
-improved the layout of the long vertical pipes in the sewer
-changed the color of the ceiling light in the stadium closet
-removed an orange barrier near the beginning of the map
-fixed an incorrect texture in the sewer maintenance room
-added a few missing brushes to a few pipes in the sewer
-added 2 electric boxes and the missing sewer light wires
-added a new burger tank illuminated sign in the stadium
-removed a filing cabinet prop near the start of the level
-added a new health item spawn to a table on the field
-fixed texture alignment in a few places of the sewer
-added missing clip brushes to the food court tables
-added a new mirror prop to the stadium food court
-fixed cubemaps with visible seams in many areas
-decreased the spawn rate of boomer bile slightly
-added some missing scum textures in the sewer
-added a new ambient light to the tall pipe corner
-added a pistol spawn to the board in the sewer
-adjusted the position of the sewer sign slightly
-added a new ammo upgrade to the food court
-removed the vents from the Burger Tank roof
-removed a duplicate wall brush in the sewer
-fixed the lighting on two pipes in the sewer
-changed the food court's tile floor texture
-improved lightmaps throughout the level
-simplified some lightning strike brushes
-enabled vertex lighting on a few props
-added a bit more water in the sewer
-added roaches to a few areas
-added in some new overlays

visual overhaul and other minor improvements to map 2

-closed the blinds (and darkened them) on some decorative windows and removed others for better optimization
-replaced textures on the stairs leading from the saferoom with cheaper versions to stop unwanted reflections
-added the missing posts and properly aligned the semi bumpers on the long storage facility
-added the missing glass windows to the double doors in the warehouse and alley building
-removed the library's middle railing and angled the outside ones for a more pleasing look
-made the far end of the parking garage upper floor black (to hide the entrance-less wall)
-removed an extra raindrop particle effect from a puddle near the beginning of the level
-added a crate and trash can prop to the library's back room and removed a board
-fixed a soundscape that was playing the wrong sound file near the end saferoom
-added the missing flies and fly sounds to the corpse pile in the parking garage
-adjusted the position of the police cars near the library and lit one's light bar
-fixed the lamp post in the library garden not shining properly on the ground
-replaced a piece of text graffiti with a safehouse arrow in the warehouse
-added a gas can spawn to the back of the pickup near the flower store
-fixed an area where you could see through the ground by the nail salon
-fixed a section of missing parking lines in the Tobacco plant parking lot
-improved the design of the breakable wall in the parking garage
-added a new glow effect to the fire in the bookstore window
-adjusted the position of a desk prop in the warehouse office
-added a new health item spawn to a table outside the library
-decreased the spawn rate of health items and grenades a bit
-fixed some brush faces that weren't rendered with nodraw
-added an ammo upgrade somewhere in the parking garage
-added the missing metal foundation to the tunnel staircase
-changed the type of glass on the alley building's windows
-fixed interior fog not working correctly inside the library
-added some pop cans near the library vending machine
-removed some far away props for better optimization
-turned off a ceiling light in the break room bathroom
-added some new leaf overlays to the flower store
-flipped the opening direction of a bathroom door
-enlarged some breakable infected wall indicators
-fixed cubemaps with visible seams in many areas
-added 2 new fire extinguishers to the warehouse
-added in missing clip brushes under some tables
-moved a trash pile so that it illuminates properly
-fixed missing logic for the break room fridge
-added a missing section of rain particles
-improved the lightmaps in many areas
-added in a few missing clip brushes
-removed some leftover brushes
-added roaches to a few places
-minor navmesh adjustments
-added a few new decals

visual overhaul and other improvements to map 1

-added spawn entities for the L4D2 survivors (they won't spawn inside the ground or in props anymore)
-fixed survivor bots trying to jump through windows and climb the infected ladder in the box store
-replaced the crane's magnet with a unique hook and strap model (courtesy of SirWololo)
-turned off a light and changed the spawn position of some doors in the last apartment
-removed the spark effect from the crane's tail lights and added new lights to the cab
-replaced some decorative door props with simple brushes for better optimization
-stopped infected from spawning in the far buildings during the crane crescendo
-replaced the concrete floor texture in the garage with a more detailed version
-added a health item spawn to the housekeeping closet in the first apartment
-added the missing power lines to the buildings after the crescendo event
-added a grenade spawn to the bottom of the apartment elevator shaft
-added a new hint to the crane crescendo to better explain what to do
-moved a crate prop in the last building so that it illuminates better
-changed detailsprites so that they match the 4th and 5th chapter
-added the missing burning sound to the exploded tanker truck
-added back in the original intro monologue (albeit modified)
-improved the lightmaps in many areas throughout the level
-removed a few decorative windows for better optimization
-added a grenade launcher spawn somewhere in the level
-removed a few distant detail props for better optimization
-added 3 new illuminated lamp props for more immersion
-blocked off the double doors in the office building better
-fixed the lighting on some boxes in the final building
-lit the lamp on the explore-able apartment balcony
-added a new light to the catwalk in the box store
-added a new death barrier underneath the crane
-fixed areas where cubemaps had visible seams
-made refrigerator lights turn on and off instantly
-fixed some doors not opening both directions
-moved an item spawn in the small garage
-fixed and removed a few infected ladders
-added 3 new ceiling lights to the garage
-enabled vertex lighting on many props
-minor improvements to the navmesh
-added a new corpse near the crane
-added roaches in a few areas
-added a few new decals

small improvement for map 5

-the "final nail" theme now plays after the first tank is killed and the 2nd wave begins, just like L4D1

minor update to map 4

-moved a rock prop away from a wall slightly so players don't get caught on it
-added 3 new lights (and lit one of them) to the telephone poles in the woods
-flipped the sideways door model in the last safehouse to match map 5
-replaced 2 displacements near the last safehouse
-turned off a ceiling light inside the small building
-re-enabled vertex lighting on many props
-re-did most detail blocking entities
-some minor nav changes

many improvements to map 5

-replaced the wood post props on the station awnings with brush versions so that they illuminate properly
-replaced the No Mercy saferoom music with the proper Crash Course version to match the other levels
-removed a light and fixed one that wasn't shining on the ground properly in the small barn
-added a new trapdoor in the station's ceiling to give infected more areas to attack from
-removed the radio from the starting safehouse for a more vanilla style experience
-added in the missing flip animation and spark effect to the station's generator
-adjusted the position of the survivor spawn entities in the starting safehouse
-added a new hint to the generator to better explain how to trigger the finale
-stopped infected from climbing into the fire barriers surrounding the station
-added some new dialogue in the starting safehouse and around the map
-added a new grenade and ammo upgrade spawn in the small barn
-made the edge of the map less obvious near the start of the level
-moved two grenade spawns that were too close to each other
-added a new wooden trim to the safehouse's outside door
-improved the lightmaps on the inner walls of the station
-added the missing tree spawn entities for versus mode
-fixed all displacement grass that wasn't showing
-re-enabled vertex lighting on lots of props
-many improvements to the navmesh
-added a few new infected ladders

a few improvements to map 4

-placed the info_lighting entity from the previous map in to the beginning saferoom for the pipe couplings
-replaced a rock prop near the bridge with a bush prop to prevent survivors from getting out of bounds
-removed an info_remarkable in the woods to prevent the survivors possibly saying the same line twice
-added in some missing clip brushes to prevent survivors from getting out of bounds
-fixed the lamp posts on the bridge not shining properly on the ground
-added a new lantern prop near the river to help guide players better
-updated the river warning message to better match a Valve one
-fixed a moth particle effect that wasn't showing
-turned off a police car light bar on the bridge
-added a few new infected ladders
-a few minor nav adjustments

many improvements to map 2

-replaced the clip brushes on the parking garage door with blockbullets to prevent shooting through it
-moved a rubble pile, carpet stain and tipped over bookshelf forwards a bit in the library
-changed all grass textures and detail sprites in the level to match the third chapter's
-opened up the library roof and added 2 new ladders for better infected navigation
-overhauled the design of the library roof and added some missing rain particles
-removed a monitor prop that kept clipping through a shelf (for some reason?)
-removed a section of fence and moved a van prop near the start of the level
-placed some health item spawns and an oxygen tank in the first ambulance
-removed the "X alerted the horde" warning from the truck crash crescendo
-turned on a light near the opened library gate to help guide players better
-moved around and added a few new rain dripping particles and puddles
-shortened the length of the long store's awning for a more pleasing look
-added the missing glass and rain particles to the warehouse skylight
-fixed survivor bots jumping through the windows of certain buildings
-added a new warning message when entering the parking garage
-added more detail to the hole in the warehouse freezer ceiling
-moved the blue car in the garage back slightly for more room
-added a new spark effect to the parking garage door opener
-removed some duplicate and non-functional logic entities
-made the break room fridge light turn on and off instantly
-added new survivor dialogue to the beginning safehouse
-removed collision from a wheelchair and gurney prop
-made a static construction barrel into a physics prop
-added some new scaffolding to a few tall buildings
-lowered a tree prop slightly near the warehouse
-added 2 new lamp posts to the library's garden
-added the missing clip brushes to a few tables
-added some new bug particles to a few lights
-decreased the skybox for better optimization
-added and removed some infected ladders
-re-enabled vertex lighting on a few props
-many tweaks to the navmesh

minor update to map 4:

-added the missing clip brushes, pipe coupler and floor grate to the starting safehouse
-new clip brushes added to the boxes outside the safehouse
-new survivor dialogue in the starting safehouse

many improvements to map 3:

-added new infected ladders, pipes and detail geometry to the upper sewer platforms for better infected navigation
-added brand new survivor dialogue to the starting saferoom, tank event and howitzer crescendo in the stadium
-fixed survivor bots trying to walk underneath the catwalks and trying to jump through windows in the sewer
-added some crate props to the upper floor of the stadium to give special infected more areas to hide
-replaced all of the long fluorescent lights in the stadium with better variants pulled from Dead Air
-added the missing coupling to a pipe and new floor grate in the ending saferoom
-added new stabilizer bars to the long catwalks in the sewer as per OSHA
-the tank event has been revamped to be "more sudden and frightening"
-turned on/off a few lights inside of the stadium for a more pleasing look
-filled in a few empty walls with graffiti and stains in the sewer
-set up some custom instructor hints to help new players
-many improvements to the navmesh