$bumpmap

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$bumpmap是一个材质(en)着色器(en)参数，可在所有的 起源 游戏中使用。

A material's diffuse (left) compared to its normal map.

The above material in-game.

It specifies a texture that will provide three-dimensional lighting information for a material. The texture is a bump map, but the process it is used for is called  normal mapping. The two terms are often used interchangeably, however.

警告:$bumpmap will disable prop_static's per-vertex lighting in every Source game before CS：GO 引擎分支.
Not enough data is stored in the vertices for normal mapping, so the engine has no choice but to fall back.

重要:Bumpmapped brushes and displacements generate four lightmaps per-surface (one for each light direction, plus non-bumped version), instead of one. If $bumpmap or $normalmap is added to a VMT that did not have it at the time of compilation, the map must be recompiled.

注意:This does not apply to maps compiled using the -bumpall VBSP parameter (Which creates 4 lightmaps for all faces, regardless of if they are bumpmapped). This parameter should not be used often, however, as it significantly increases lightmap usage.

重要:$bumpmap does not exist for LightmappedReflective. Use $normalmap instead.

注意:

• In the Water shader, $bumpmap is for a DX8 du/dv map. Use $normalmap instead.
• Bump maps cannot be used on decal textures except in CS：GO 引擎分支.
• On VertexLitGeneric using $lightwarptexture will force bumpmapping even if $bumpmap is not in the VMT. A default one is bound instead, all $bumpmap caveats come with it.

错误: $bumpmap causes some other Parameters to not work. Parameters that will break with $bumpmap are ( but not limited to ) :

• Will not work with materials using $envmapmask. Except on VertexLitGeneric(仅存在于 之中) and LightmappedGeneric(仅存在于 之中). See Alternative methods.
• In LightmappedGeneric, $detailblendmode 9 cannot be used.
• In VertexLitGeneric, $detailblendmode 5, 6, 8, 9, 10 and 11 not usable. With $phong 5 and 6 can be used.
• In VertexLitGeneric, $detailblendmode 5-11 not usable. With $phong 5 and 6 can be used.
• In $detailtint won't work.
• $distancealpha, $outline, $softedges won't work.
• On LightmappedGeneric, cannot be used with $basealphaenvmapmask

  [todo tested in ?]

Basic Syntax

LightmappedGeneric
{
	$basetexture	brick/brickwall021a
	$surfaceprop	brick
	$bumpmap		brick/brickwall021a_normal
}

Additional Parameters

$bumptransform $bumpframe $nodiffusebumplighting $ssbump $forcebump $bump_force_on $addbumpmaps $bumpmap2 $bumpframe2 $bumptransform2 $bumpmask $bumpdetailscale1

Console Commands

mat_fastnobump <布尔值(en)>

Quickly enables/disabled normal mapping.

mat_normalmaps <布尔值(en)>

Displays the bump map texture of all materials that have one in place of their diffuse.

mat_bumpmap <布尔值(en)>

Enable or disable normal mapping. Default 1.

See also

• $ssbump
• Bump map, for technical details and a guide to creation.