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Revision as of 06:07, 25 August 2019 by Blixibon (talk | contribs) ($basetexturetransform2's existence seems to be very borked, need further data)
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$basetexture is a material shader parameter available in all Source games. It defines an albedo texture. It is very rare for a material not to use this parameter and some shaders will load a default texture if it stays undefined.

VMT syntax

$basetexture	<texture without extension, relative to <game>\materials\>
	$basetexture	brick\brickwall031b

Additional parameters

$basetexturetransform <matrix>
Transforms the texture before use in the material. This does not affect lightmaps on the surface.
The default position is "center .5 .5 scale 1 1 rotate 0 translate 0 0".
  1. center defines the point of rotation. Only useful if rotate is being used.
  2. scale fits the texture into the material the given number of times. '2 1' is a 50% scale in the X axis.
  3. rotate rotates the texture counter-clockwise in degrees. Accepts any number, including negatives.
  4. translate shifts the texture by the given numbers. '.5' will shift it half-way.
Note.png Note: All values must be included!
Bug.png Bug: Scaling the texture may cause odd issues where the Texture Lock tool in Hammer will not actually lock the texture in place.
Bug.png Bug: Rotating textures applied on brushes will rotate around the map origin (confirm: Orangebox engine only?). A fix for this is to change the center position in the VMT to the brush's origin.
$basetextureoffset <normal>
To do: DX8 version of translate?
$basetexturescale <normal>
To do: DX8 version of scale?
$frame <integer>
The frame displayed for a multi-frame texture. This is normally set by the AnimatedTexture or TextureToggle proxies, but can be set manually. The value must be a valid index, or crashes might occur.


Some shaders (most notably WorldVertexTransition) allow the use of two albedos. The second texture is handled by a mirrored set of commands with '2' in their name:

$basetexture2 <texture>
$basetexturetransform2 <matrix>
Bug.png Bug: $basetexturetransform2 doesn't exist in the DX9 version of WorldVertexTransition, only working with the DX8 shader. This is the case in Source 2007, Source 2013, and Alien Swarm. Other games have not been tested.
$basetextureoffset2 <normal>
Confirm:Does this parameter and the one below it even exist?
$basetexturescale2 <normal>
$frame2 <integer>

There are further '2' commands applying to various shader effects, which are each documented in their respective articles.

See Also