$bumpmap

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

Basic syntax

"$bumpmap" <texture>

• <texture> is the name of the VTF texture to be used as the bumpmap/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 <float (1)>

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 <integer (0)>

Frame number to use from an animated bumpmap texture.

$bumptransform <matrix (center .5 .5 scale 1 1 rotate 0 translate 0 0)>

Transforms the bumpmap texture.

$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 <integer (0)>

Frame number for $bumpmap2.

DirectX 9 required.

$nodiffusebumplighting <boolean (0)>

If set to 1, no diffuse bump lighting will be done.

See Dealing with fillrate issues.

Requires LightmappedGeneric shading.

$forcebump <boolean (0)>

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

Requires DirectX 8.

See also

• Normal Map Creation in The GIMP