Tool textures (Source)

The tools textures can easily be found in Hammer by running "tools" as a filter word in the texture browser. These textures have extra attributes that most textures do not.

Note:Here's a tutorial on using many of the Source Tool textures shown below

Image	Name	Special attributes
	Area portal	Use with func_areaportals and func_areaportalwindows
	Black	Black texture, unaffected by light.
	Block LOS	Blocks the line-of-sight of NPCs and bots.
	Block bullets	Solid to bullets but not light or other objects.
	Block light	Invisible; casts shadow like standard materials
	Clip	Solid to all objects. Is not rendered.
	Player clip control	Purpose is unknown, possibly a clip texture for player-controlled vehicles e.g. Airboat, Jeep. (See "player clip" below for the tool texture that restricts player movement.)
File:Dotted.gif	Dotted	Purpose is unknown. Possibly a texture for marking areas during development. Is always rendered despite blocking objects; solid; does not block visibility.
	Fog	Does not seem to work. (You can use this for func_smokevolume instead of the trigger texture but NOT for func_dustcoud)
	Hint	Divides visleafs.
	Invisible	Solid to all objects, invisible and does not cast shadows
	Ladder	Invisible; Use in Counter-Strike: Source with func_ladder.
	No Draw	Solid; Invisible; seals leaks; blocks visibility if used on all surfaces of the same brush
	No Draw Roof	Identical to No Draw. The only difference being a separate texture name to differentiate them.
	NPC clip	Solid to NPCs but not players or other objects, is not rendered.
	Occluder	Use with func_occluders
	Origin	Use to set the rotation origin of rotating entities; deprecated for use in Source maps (Basic idea of an origin brush was used in Goldsource mapping)
	Player clip	Solid to players but not NPCs or other objects, is not rendered.
	Skip	Invisible; has no effect on anything. Useful in combination with HINT. SKIP faces are removed during compile, so a brush textured with skip won't prevent leaks. Also useful as a tool in Hammer for grouping, moving, place-holding objects.
	Skybox	Use to make 2D skyboxes. Casts light if there is a light_environment entity in the map.
	SkyFog	[Todo] toolsskyfog.vmt does not contain any properties.
	Trigger	Use on Trigger entities and Buyzones in Counter-Strike: Source. Also don't forget to move the selected trigger brush(es) ToEntity so you can change the properties.