Zh/$envmapmask

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$envmapmask是一个材质(en)着色器(en)参数，可在所有的 起源 游戏中使用。 It defines a specular mask which affects how strongly each pixel of a material reflects light from the $envmap. The mask should be a grayscale image in which entirely reflective areas are white and entirely matte areas are black. For diffuse type specularity which does not rely on $envmap, see $phong.

错误:In 起源2007 games, using an $envmapmask which is not stored in a subfolder will cause the texture to fail loading in-game.

警告:$envmapmask will not work with materials using $bumpmap/ in most situations; see #Alternative_methods.

注意:Exceptions:

• LightmappedReflective(en) (uses $normalmap)
• (仅存在于 之中) VertexLitGeneric(en)
• (仅存在于 之中)LightmappedGeneric(en)

警告:$envmapmask will not work with materials using $phong, at all. By default it will use the $basetexture's alpha channel for masking the envmap.

注意:While specular masks are traditionally greyscale, they can be colored. In such an instance, the color data will act as a per-texel $envmaptint.

VMT syntax example

$envmapmask <texture>

VertexLitGeneric(en)
{
	$envmap(en)			env_cubemap
	$envmapmask		"props/tvscreen_test"
}

Additional parameters

npc_cscanner(en)'s mask.

$envmapmasktransform $envmapmaskscale $envmapmaskframe

CS:GO WorldVertexTransition Parameters

$envmapmask2 $envmapmasktransform2 $envmapframe2

Alternative methods

Rather than creating a whole new texture for a specular mask, you can embed one into the alpha channel(en) of the $basetexture or $bumpmap. Model materials with $bumpmap must do this. Unfortunately, it won't reduce memory usage.

If you do use these commands, transformations and other such parameters applied to $basetexture / $bumpmap will also apply to the specular mask.

$basealphaenvmapmask

注意:

• Alpha channels embedded in $basetexture work in reverse. Transparent areas are reflective, opaque areas are matte. This is because, say, a window texture's alpha mask would be mostly black to allow for transparency -- yet that black part of the mask would also be the most reflective part. To avoid having to duplicate a texture file simply to invert the alpha mask, you can use this material parameter instead.
• The alpha channel is not inverted in 起源2007 and 反恐精英：全球攻势 for models, but the alpha channel is inverted for brushes!

• In , the alpha channel is only inverted for models if $phong is disabled!

• auto enables if $envmap is present. Opaque areas are reflective while transparent are matte. Set as true(en) to invert $basetexture alpha channel behaviour. This allow $bumpmap(en) have a dedicated $phong(en) mask, when material transparency is not needed.

错误:

• In CSGO, this parameter breaks materials using $translucent. Use $envmapmask or $normalmapalphaenvmapmask instead.
  
• In all of: on VertexLitGeneric (Without $phong), WorldVertexTransition and LightmappedGeneric, $basealphaenvmapmask cannot be used with $bumpmap.
  
• In all of: on LightmappedGeneric and WorldVertexTransition, $basealphaenvmapmask cannot be used with $selfillum, $seamless_detail or $distancealpha.
  
• In , on LightmappedGeneric and WorldVertexTransition, $basealphaenvmapmask cannot be used with $detailblendmode(en) "9" or $envmapanisotropy.
  
• In , on Lightmapped_4WayBlend, $basealphaenvmapmask cannot be used with $selfillum.
• This cannot be used with $bumpmap on LightmappedGeneric

  [todo tested in ?]

$normalmapalphaenvmapmask

错误:

• In all of: on VertexLitGeneric (Without $phong), $normalmapalphaenvmapmask cannot be used with $selfillumfresnel(en).
  

注意: Using $normalmapalphaenvmapmask with $phong and $selfillumfresnel(en) has special caveats that should be considered. Check $phong for for more information.

• In , on LightmappedGeneric and WorldVertexTransition, $normalmapalphaenvmapmask(en) cannot be used with $detailblendmode(en) "9" or $envmapanisotropy.  [todo tested in ?]

$selfillum_envmapmask_alpha
$envmapmaskintintmasktexture

Merging Specular Level into Normal Alpha in 3ds Max

To merge a Specular Level map into the Normal Map alpha, you can create a Composite Map node with the normal map in Layer 1 and the specular map in Mask 1. Then right-click the composite map, click Render Map and save this new image to file (remembering to keep the Gamma at 1.0 and using 32 bits per pixel in the save options).

These steps are automated in the Alpha Spec tool in Wall Worm 2.72+.

See also

• $basetexture(en)
• $envmap(en) (environment map)
• $phong(en) (diffuse reflection)
• $selfillum (en)