$lightwarptexture

这项技术首次应用于

胜利之日：起源'的雪地地图之中, 比如Kalt的雪景。

$lightwarptexture 在

军团要塞2中渲染人物的图解

可以实现色调分离，但照明必须严格控制。

$lightwarptexture(DX9+ SM3)是一个用于着色器 VertexLitGeneric 的材质(en)着色器(en)参数，可在所有的起源游戏，自从起源2006 以来中使用。它的色调texel(en)取决于它们的亮度。它可以被认为是局部的彩色修正(en)．

警告

重要:$lightwarptexture 必须指定后所有其他纹理，否则它将覆盖它们。

重要:$lightwarptexture 在VertexLitGeneric 之后需要一个 $bumpmap. 如果未指定，则使用默认值! 就好像是 $bumpmap 在VMT!

警告: 这意味着所有不能工作的参数 $bumpmap 同样也不会与 $lightwarptexture合作.

$detailblendmode 5-9 won't work - 5 & 6 will work when $phong is used.
$envmapmask won't work except in Mapbase. $selfillum_envmapmask_alpha Doesn't work in any branch.

注意：Does not work without $phong on VertexLitGeneric in

反恐精英：起源 and

CS：GO 引擎分支.

注意：$lightwarptexture does not seem to exist at all for LightmappedGeneric in

CS：GO 引擎分支.

错误:Does not work when using $detail or $bumpmap2 on both LightmappedGeneric and WorldVertexTransition. [todo tested in?]

错误:Does not work when using $selfillumfresnel without also using $phong. [todo tested in?]

错误:Does not work when using $seamless_scale. [todo tested in?]

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

snow_warp: $dod\materials\ground\snow_warp$; This is the lightwarp texture used in the 胜利之日：起源 screen to the right. It is designed to add a subtle bluish tint to darker snow without affecting brighter regions.
pyro_lightwarp: $tf\materials\models\player\pyro\pyro_lightwarp$; This is applied to all 军团要塞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: 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.
Cel Shading: Cel shading can make objects look more cartoony by replacing the smooth lighting gradient with sharp steps.