View source for Zh/$lightwarptexture

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[[File:Lightwarp snow.jpg|thumb|200px|这项技术首次应用于 {{dods|2}}'的雪地地图之中, 比如Kalt的雪景。]]
[[File:Lightwarp heavy.png|thumb|150px|<code>$lightwarptexture</code> 在 {{tf2|2}}中渲染人物的图解]]
[[File:Lightwarp BW.png|thumb|150px|可以实现色调分离，但照明必须严格控制。]]

{{this is a|shader parameter|name=$lightwarptexture|shader=VertexLitGeneric|since=Source 2006|notitlechange=1|nocat=1|dx=dx95}}它的色调{{L|texel}}取决于它们的亮度。它可以被认为是局部的{{L|color correction|彩色修正}}．

== 警告 ==
{{Important|<code>$lightwarptexture</code> 必须指定后所有其他纹理，否则它将覆盖它们。}}
{{Important|<code>$lightwarptexture</code> 在{{Ent|VertexLitGeneric}} 之后需要一个 {{Ent|$bumpmap}}. 如果未指定，则使用默认值! '''就好像是 {{Ent|$bumpmap}} 在VMT!'''}}
{{Warning| 这意味着所有不能工作的参数 {{Ent|$bumpmap}} 同样也不会与 <code>$lightwarptexture</code>合作.}}
:* [[$detail#Parameters and Effects|$detailblendmode]] 5-9 won't work - 5 & 6 will work when {{Ent|$phong}} is used.
:* {{Ent|$envmapmask}} won't work except in {{mapbase|4}}. {{Ent|$selfillum_envmapmask_alpha}} Doesn't work in any branch.
{{Note|Does not work without {{Ent|$phong}} on {{Ent|VertexLitGeneric}} in {{css|2}} '''and''' {{csgobranch|4}}.}}
{{Note|<code>$lightwarptexture</code> does not seem to exist at all for {{Ent|LightmappedGeneric}} in {{csgobranch|4}}.}}

{{Bug|Does not work when using {{Ent|$detail}} '''or''' {{Ent|$bumpmap2}} on both {{Ent|LightmappedGeneric}} and {{Ent|WorldVertexTransition}}.}}
{{Bug|Does not work when using [[Glowing_Textures#.24selfillum|$selfillumfresnel]] without also using {{Ent|$phong}}.}}
{{Bug|Does not work when using {{Ent|$seamless_scale}}.}}
  

== Lightwarp textures ==
A lightwarp texture is a one-dimensional strip of pixels. Dark texels will be tinted with the colour on the left-hand side, and bright texels with the colour on the right. 50% gray means no tint.

=== Examples ===
; <code>snow_warp</code>:[[File:Warptexture.jpg|border|dod\materials\ground\snow_warp]]
: This is the lightwarp texture used in the {{dods|2}} screen to the right. It is designed to add a subtle bluish tint to darker snow without affecting brighter regions.
; <code>pyro_lightwarp</code>:[[File:Pyro lightwarp.png|border|tf\materials\models\player\pyro\pyro_lightwarp]]
: This is applied to all {{tf2|2}} characters, not just the Pyro. It creates the high-contrast shadows with red-tinged terminators typical of the illustrative art the game apes.
; Posterized: [[File:Warp bw.png|border|Custom texture]]
: This custom warp texture creates a posterized "line art" style. Enabling lightwarp alone isn't enough however: ambient lighting must be at 0 to make unlit areas black, and world lighting must become viewer-dependent to ensure that shadows are always cast.
; <code>Cel Shading</code>:[[File:Cel_lightwarp.png|border|Custom texture]]
:Cel shading can make objects look more cartoony by replacing the smooth lighting gradient with sharp steps.

Other possible uses of <code>$lightwarptexture</code> include contrast enhancement, tweaking vertex lighting shadow transitions, highlight softening, and more.


::[[File:Celshadingpreview.png|thumb|320px|left|Cel shading in action.]]

{{ACategory|Shader parameters|l}}