$bumpmap

From Valve Developer Community

The $bumpmap VMT parameter specifies the VTF texture to use for the 'bump' or normalmap of the material surface.

Table of contents

1 Basic syntax 2 Additional parameters 2.1 $bumpscale 2.2 $bumpframe 2.3 $bumptransform 2.4 $bumpoffset 2.5 $bumpmap2 2.6 $bumpframe2 2.7 $nodiffusebumplighting 2.8 $forcebump 3 See also

Basic syntax

"$bumpmap" "<texture>"

• <texture>> is the name of the VTF texture to be used as the normalmap.
• The .vtf file extension is not used in VMT texture references.
• The name can be preceeded by the filepath relative to the game_directory/materials folder.
• Example:

"$bumpmap" "Path/Texture1_normal"

Additional parameters

$bumpscale

$bumpscale <float>

• Scales the $bumpmap by the <float> value.
• Note:Currently only used by shadertest materials. Likely an old DirectX 8 fallback shader, later replaced by the DirectX 8 version of the $bumptransform parameter.

$bumpframe

$bumpframe <integer>

• Frame number to use from an animated bumpmap texture.

$bumptransform

$bumptransform <matrix>

• Transforms the bumpmap texture.
• The default position is: "center .5 .5 scale 1 1 rotate 0 translate 0 0".

• "center" values are UV 0.1 coordinates.
• "scale" values are UV factors.
• "translate" values are UV 0.1 coordinates.
• "rotate" values are 0-360 degree UV angles.
• Note : You must include all variables.

$bumpoffset

$bumpoffset <>

• To do: dx8 version of center?

$bumpmap2

$bumpmap2 <texture> 

• Used by the WorldVertexTransition shader to blend materials on Displacement surfaces (eg terrain).
• The percentage blend of each of the two textures is defined by alpha painting in Hammer.
• DirectX 9 required.

$bumpframe2

$bumpframe2 <integer>

• Frame number for $bumpmap2.
• DirectX 9 required.

$nodiffusebumplighting

$nodiffusebumplighting 1

• If set to 1, no diffuse bump lighting will be done.
• See Dealing with fillrate issues.
• Requires LightmappedGeneric shading.

$forcebump

$forcebump 1

• If set to 1, always does bumpmapping (even if the graphics card doesn't say it can handle it).
• Requires DirectX 8.

See also

• $bumpmap2 for Blended Materials
• Normal Maps
• Normal Map Creation
• Normal Map Creation in The GIMP