Tool textures (Source)

Tool textures are used, mostly by the tools but sometimes by the engine, to perform special tasks. They can easily be found in Hammer by using "tools\" as a filter in the texture browser.

Anyone can make their very own tool texture, by utilizing available Material Map Compile Flags, such as %compilenonsolid 1, %compileDetail 1 and %compilenodraw 1 for a tool texture which is not solid, does not cut visleafs and is invisible.

A %tooltexture may also be set, which is only to be seen in Hammer, while the $basetexture is seen in-game; however, the self made tool textures must be shipped with the map, else they might not work.

Template:ModernTip Template:ModernNote Template:ModernWarning Template:ModernNote

General

General — Common

These tool textures are available in every Source engine game.
Some of these textures have special function in some games. These special functions are noted by having the game's icon listed in the description. Such as ,,,, ect.

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Black	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Risk of Confusion:This is the Tools/ToolsBlack texture, not the Halflife/Black texture. This texture is often used for brushes that are far away and they are dark. It cannot be lit by any type of light, but is affected by fog color. An example of its use is in the "space" backgrounds during the G-Man monologues in Half-Life 2 or for crude buildings in the 3D Skybox. Uses UnlitGeneric in: Uses LightmappedGeneric in: While in most games, the different shader has no impact, it might have a different function in other games. In that case, you may want to use vgui/black instead or make your own tool texture.
	White	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	(in all games since ) Identical to Tools/ToolsBlack, only in white.
	Block Bullets	No	No	Yes	No	Yes	Yes	Yes	Yes (No Marks)	Foremost solid to bullets, but also to NPCs and physics projectiles. It does not block all projectiles, though. Projectiles from NPCs, such as the acid spit from antlion workers, will still get through. To allow NPCs and their line of sight to pass through, turn the brush into a func_brush with its Solidity keyvalue set to a solid state. Use blockbullets_cs variant, which correctly stops bullets even with 1 unit thickness.
	Invisible	No	No	Yes	No	Yes	Yes	Yes	No	Solid to prop_physics, projectiles, players, & NPCs. Not solid to bullets. Also solid to bullets. Smokers, Boomers and Spitters can attack you through it. Survivors stop being dragged towards smokers when touching a tools/invisible wall. Risk of Confusion: Tools/ToolsNodraw_Noshadow uses the same tool texture in the texture browser, which also blocks LOS!
	(Invisible) Ladder	No	No	Yes	No	Yes	Yes	Yes	No	Used with func_ladder in the most multiplayer games except .
	Nodraw	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Not drawn in game, seals leaks, and is skipped by VRAD. Blocks visibility if used on all surfaces of the same brush. Optimally, every face that can't be seen during normal gameplay should have this texture. Portals can be placed on it, but not in . Use Nodraw Portalable instead if this behavior is desired.
	Origin	N/A	No	No	No	No	No	No	No	Deprecated:Leftover from GoldSrc, where a brush with this texture was used to set the rotation origin of rotating entities. It is still functional in Source (overriding the entity's origin keyvalue) but no longer necessary. When placed outside of a brush entity, the compiler will fail with the error origin brushes not allowed in world. Not available in all branches.
	Block LOS	No	No	No	Yes	No	No	No	No	Blocks the line of sight of NPCs and bots. mat_wireframe 1/2 will reveal that, while this texture doesn't block visleaves, it draws crossing polygons, and they alone are capable of preventing the engine from rendering enveloped brushwork. This can be worked around by turning the Block LOS–textured brush into a func_brush with its Solidity keyvalue set to a solid state. (A Block LOS func_brush can still be traversed in this state.)
	Block Light	No	Yes	No	No	No	No	No	No	Casts shadows artificially. Only used at compile time by VRAD. Does not seal leaks. See more uses here.
	Trigger	Yes	No	No	No	No	No	No	No	Used on triggers and on func_viscluster entities.

General — Game-specific

These tool textures are only available in specific Source engine games.

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Black Cheap	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Identical to Tools/ToolsBlack, the only difference is that uses special "black" shader. has a replacement that works with older engines. Template:ModernTodo
	Black Nofog	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Identical to Tools/ToolsBlack, but no fog will appear in front of it. Uses the UnlitGeneric shader. Inherits various City17 %keywords from Tools/ToolsBlack.
	Black Noportal	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Identical to Tools/ToolsBlack. Seems to have been intended as a non-portalable version, but this is already the case with the normal texture in the final game.
	Black Noportal Nofog	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Identical to Tools/ToolsBlack, but does not render fog.
	Black Noportal Skybox	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Identical to Tools/ToolsBlack_Cheap.
	Nolight	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Identical to Tools/ToolsBlack, but for some reason is used instead.
	Black Arkane	Yes	Yes	Yes	Yes	Yes	Yes	Yes	N/A	Identical to Tools/ToolsBlack, but for some reason is used instead.
	White Arkane	Yes	Yes	Yes	Yes	Yes	Yes	Yes	N/A	Identical to Tools/ToolsWhite, but for some reason is used instead.
	Block Bullets 2	No	No	No	No	Yes	Yes	Yes	Yes (No Marks)	Identical to Tools/ToolsBlockBullets, but doesn't cut visleaves.
	Blocks Bullets Forcefield	No	No	Yes	No	Yes	Yes	Yes	Yes (No Marks)	Identical to Tools/ToolsBlockBullets, but uses the "forcefield" surfaceprop.
	Invisible Non-Solid	No	Yes	Yes	Yes	No	No	No	No	Not solid to anything, but blocks LOS. Useful as a utility texture, like buttons you should be able to clip into.
	Nodraw Roof	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Identical to Tools/ToolsNodraw, but with a different texture name.
	Nodraw Wood	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Identical to Tools/ToolsNodraw, but will make wood impact sounds when hit.
	Nodraw Stone	No	Yes	Yes	Yes	Yes	Yes	Yes	N/A	Identical to Tools/ToolsNodraw, but will make stone impact sounds when hit.
	Nodraw Invisible	No	No	No	No	Yes	Yes	Yes	N/A	A translucent Nodraw texture. Cannot be used to seal the map.
	Nodraw Noshadow	No	No	Yes	Yes	Yes	Yes	Yes	N/A	Identical to Nodraw but does not cast any shadows. Risk of Confusion: Uses the Invisible texture instead.
	Nodraw Metal	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Identical to Tools/ToolsNodraw but with metal surfaceprop, Does not show metal marks. You may want to use Tools/Invismetal instead.
	Nodraw Surfaceprop	No	No	Yes	Yes	Yes	Yes	Yes	N/A	Seven, materials all identical to Tools/ToolsNodraw but using different surfaceprop types (chitin, dirt, grass, metal, sand, stone, wood) and not casting any shadows.
	Nodraw Portalable	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Identical to Tools/ToolsNodraw, but portals can be placed on this texture.
	Viscluster	Yes	No	No	No	No	No	No	No	Identical to Trigger, but used for func_viscluster.
	XOG Volume	Yes	No	No	No	No	No	No	No	Identical to Trigger, but used for newxog_volume.
	CSM Volume	Yes	No	No	No	No	No	No	No	Identical to Trigger, but used for trigger_csm_volume.
	Color Correction	No	No	No	No	Yes	Yes	Yes	No	A tool texture used for color_correction_volume.
	Soundscape Trigger	No	No	No	No	Yes	Yes	Yes	No	A tool texture used for trigger_soundscape.

Optimization

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Areaportal	Yes	No	Yes	No	No	No	No	No	Use with areaportals (func_areaportals and func_areaportalwindows). Can be used with other brush entities, such as some triggers.
	Hint	No	No	Yes	No	No	No	No	No	Instructs VVIS to cut visleaves along this texture, but does nothing else.
	Skip	No	No	No	No	No	No	No	No	Has no effect on anything. Skip faces are removed during compile, so a brush textured with Skip won't prevent leaks. Useful in combination with Hint tool textures (to prevent the other sides from cutting vis) and as a tool in Hammer for grouping, moving and place-holding objects.
	Occluder	Yes	No	No	No	No	No	No	No	Used only for the occluding sides of func_occluder entities.

Clips

Clips — Common

These tool textures are available in every source engine game.
Some of these textures have special function in some games. These special functions are noted by having the game's icon listed in the description (such as ,,, etc.).

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Clip	No	No	No	No	Yes	Yes	No	No	Solid to players and NPCs but not other objects. Also solid to item pickups like ammo packs but not dropped weapons. Solid to dropped C4. Solid to hostages in . Feature clip brush textures with different material types: Concrete, Dirt, Glass, Grass, Gravel, Metal, Metal Sand Barrel, Metal Grate, Metal Vehicle, Plastic, Rubber, Rubber Tire, Sand, Tile, Wood, Wood Basket, Wood Crate. See more about clip texture here.
	NPC Clip	No	No	No	No	Yes	No	No	No	Solid to NPCs only. Solid to bots. Not solid to hostages. Solid to infected only, but does not stop Smokers, Boomers and Spitters from attacking through it.
	Player Clip	No	No	No	No	No	Yes	No	No	Solid to players only. Also solid to item pickups like ammo packs but not dropped weapons. Solid to players, bots (!), and dropped C4. Solid to hostages in . Solid to the survivors only.
	Player Control Clip	Yes	Yes	Yes	N/A	Yes	Yes	Yes	Yes (Marks)	(removed since )(also in ) Deprecated:This texture has to be tied to an entity to gain any special abilities, but what entity is not yet confirmed. Seems that it is necessary for func_vehicleclip. (See Player Clip above for the tool texture that restricts player movement.)

Clips — Game-Specific

These tool textures are only available in specific Source engine games.

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Grenade Clip	No	No	No	No	No	No	Solid to Grenades	No	Solid to grenades only.
	Stairs	No	No	No	No	No	Yes	No	No	Functionally the same to Player Clip, but allows for steeper angles when walking on, up to 63.4349488°.
	Drone Clip	No	No	No	N/A	N/A	No	No	No	Used to prevent drones getting stuck on complex geometry.
	Clip Xen Leaves Version	No	No	Yes	No	Yes	Yes	Yes	No	A special clip used for clipping the leaves in Xen.

Sky and Fog

Sky and Fog — Common

These tool textures are available in every Source engine game.
Some of these textures have special function in some games. These special functions are noted by having the game's icon listed in the description (such as ,,, ect.).

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Fog	Yes	No	Yes	No	Yes	Yes	Yes	Yes (Marks)	Confirm:Does not seem to work? (You can use this for func_smokevolume instead of the Trigger texture, but NOT for func_dustcloud.)
	Skybox	No	No	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	This texture is used to make 3D skyboxes. Casts light if there is a light_environment entity in the map. Cannot be used in the same PVS as the toolsskybox2d tool texture[Why?]. Things such as another area of a map will render on top of the skybox. An areaportal can stop this from happening, but it's generally better practice to add more scenery to cover the stuff that shouldn't be seen, reposition those things out of view, or just don't have an opening in that area.
	2D Skybox	No	No	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	(in all games since ) Used to make 2D skyboxes without displaying the 3D Skybox. Casts light if there is a light_environment entity in the map. Template:ModernBug Cannot be used in the same PVS as the toolsskybox tool texture.
	SkyFog	No	Yes	Yes	N/A	N/A	Yes	N/A	Yes (Marks)	The SkyFog texture does not contain any properties. There is currently no existing corresponding Shader called "skyfog". (Generates error Error: Material "tools/toolsskyfog" uses unknown shader "SkyFog".) Confirm:Can it be fixed to function properly if its VMT settings are changed in the Source code and recompiled?
	Fog Volume	Yes	No	No	No	No	No	No	No	(in all games since ) Used in conjunction with multiple env_fog_controllers to change fog colours and densities in a level. Fog inside its volume will not appear to have different atributes when viewed from outside its volume, as it globally changes the appearance of all fog across the map when entered.

Sky and Fog — Game-Specific

These tool textures are only available in specific Source engine games.

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Skybox NoLight	No	Yes	Yes	Yes	Yes	Yes	Yes	N/A	Identical to Skybox, but does not cast any light rays.Template:ModernTip

Miscellaneous

These are textures that have a special use, sometimes only seen in one single game.

Some of these textures are not even "real" tool textures, as they do not possess any Compile Flags, but they have some important use that no other texture available can do.

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Block Bomb	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Acts like Tools/ToolsInvisible. Possibly unimplemented.
	Climb	No	No	No	No	Yes	Yes	Yes	No	A ladder only for Infected. Not visible to Infected Players during Versus, but can be climbed on. Use Climb Versus Instead. Could be used in areas blocked by func_playerinfected_clip where Player Infected cannot go to and should be unable to see a climbing spot, but the AI should be able to use it for hordes.
	Climb Alpha	Visible to Infected	No	No	No	Yes	Yes	Yes	No	Seemingly identical to Climb Versus. The only difference is that tools\climb_alpha.vmt uses $alphatest, while tools/climb_versus.vmt uses $additive. This tool texture has so far never been used in an official campaigns.
	Climb Versus	Visible to Infected	No	No	No	Yes	Yes	Yes	No	A ladder only for infected. Must be used with func_ladder; otherwise, it will be ignored by the navigation mesh editor.
	Dotted	Yes	No	Yes	No	Yes	Yes	Yes	Yes (Marks)	A face textured with this texture is rendered on top of all other brush geometry. Furthermore, a brush with Dotted on any face will not block visibility or cull any face that it touches, meaning that any area enclosed in a Dotted-textured brush will not be removed from the map in any way.
	Dynamic Difficulty	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (Marks)	Solid to grenades. Tied to the trigger_dynamic_difficulty entity for the game's difficulty system.
	Func Fishes	Yes	No	No	No	Yes	Yes	Yes	N/A	Used with the func_fishes entity to spawn fish inside of its volume.
	Func Leaves	Yes	No	No	No	Yes	Yes	Yes	N/A	Used with the func_leaves entity to spawn leaves particles inside its volume.
	Gray	Yes	Yes	Yes	Yes	Yes	Yes	Yes	N/A	Purpose unknown; just a gray texture.
	Hide	Yes	No	Yes	No	Yes	Yes	Yes	Yes	A gradient from transparent to black. Has identical texture called cs_assault/assault_hide01.
	Interactive	No	No	No	No	Yes	Yes	Yes	Yes (No Marks)	Utility texture tied to the ship_base_interaction brush entity to specify the only surfaces available for the player to interact with the entity.
	Invisible Displacement	No	No	No	No	Yes	Yes	Yes	Depends on game	Light is not blocked by this texture, except in . Despite being in the Materials/Tools folder, this is not a tool texture. It has no abilities. It is simply an invisible texture used for displacement clipping, where you make an invisible displacement instead of a clip brush because making intricate clip brushes is difficult. Uses $decal 1 and $surfaceprop "dirt".
	Clear	Fully Translucent	Depends on use	Depends on use	N/A	Yes	Yes	Yes	Depends on use	Basic LightmappedGeneric that has no abilities other than being invisible. Officially used like tools/invisibledisplacement for displacement clipping. Has no VMT properties other than $alphatest 1.
	Invismetal	No	No	Yes	No	Yes	Yes	Yes	No	Invisible texture, with metal surface properties. Simmilar to how Nodraw Metal should have worked. Creates metal sparks when shot, but bullets pass through. Does not seal maps. Template:ModernTip
No Image	Locked	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	This is a special tool texture, intended to prevent VMEX from decompiling any maps using this custom tool texture. BSPSource ignores this, rendering it useless. It does not really exist, as every user has to make their own, but it is listed here for completeness sake.
	Non-Interactive	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Utility texture tied to the ship_base_interaction brush entity as a measure to help identify surfaces from which the player are unable to interact with said entity.
	Ship Room	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes (No Marks)	Utility texture tied to the ship_trigger_room brush entity to create several different rooms and special areas on the ship.
	Vitrail Light	Yes	No	No	No	Yes	Yes	Yes	N/A	Purpose currently unknown, properly used with some type of brush entity.
	Warm Light	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Basic UnlitGeneric texture that has no abilities. Used with func_brush to make it non-solid and fade away when approached. It being UnlitGeneric makes it seems as if it were glowing in a warm color, but is not listed in lights.rad, so it won't actually emit any light for VRAD to compile. Only used in C8M2_Subway behind the three windows to the right of the entrance of the end map saferoom building, to simulate glowing light in a room.
	Waterbounds	Yes	Yes	Yes	Yes	Yes	Yes	Yes	N/A	Used underwater when water meets the skybox.
	WrongWay	Yes (in ) Only to Infected (in )	No	Yes	No	Yes	Yes	Yes	Yes (No Marks)	Used to indicate the borders of the playable area. Only visible to Infected players. No campaign uses this tool texture anymore. See L4D Level Design: Blocking the Infected Team for more info. Used especially for the Wingman game mode. It has the same properties as WrongWay Timer. Template:ModernTip
	WrongWay Timer	Doesn't work correctly	No	Yes	No	Yes	Yes	Yes	Yes	Used for brushes that are temporarily blocking Terrorists during the freezetime of the Retakes game mode. It is only visible to players that are close to the origin of the entity that this material is applied to (e.g., func_brush), achieved with the PlayerProximity material proxy.

VR-Specific Tool Textures

Image	Name	Visible if world brush	Casts shadows	Cuts VIS leaves	Blocks NPC LOS	Solid to NPCs	Solid to player(s)	Solid to physics	Solid to bullets	Usage / Notes
	Teleport Clip	No	No	N/A	No	No	Yes	No	No	Half solid to players. Blocks player movement in VR (teleport or smooth locomotion), but not their hands. Confirm:Does not appear to function in SteamVR Home.