source: java/client_3D/static/shared/res/shaders/old_fur.glsl @ 65

//name fur
//vert
uniform float scale;
varying vec3 ecPos;
varying vec3 ecNormal;                  
void main()
{       
        vec4 vert = gl_Vertex + vec4(gl_Normal.x*scale, gl_Normal.y*scale, gl_Normal.z*scale, 0);
        gl_Position = gl_ProjectionMatrix * gl_ModelViewMatrix * vert;
        gl_TexCoord[0].st = gl_MultiTexCoord0.ts;
        gl_TexCoord[0].st *= 0.25;
        ecNormal = gl_NormalMatrix * gl_Normal;
        vec4 ecPos4 = gl_ModelViewMatrix * gl_Vertex;
        ecPos = ecPos4.xyz/ecPos4.w;
}

//frag
uniform sampler2D diffuseMap;
uniform sampler2D furMap;
varying vec3 ecPos;
varying vec3 ecNormal;
vec3 ecEye;
vec3 ecLight;

float diffuse(int lightId)
{
        ecLight = gl_LightSource[lightId].position.xyz - ecPos;
        return max(0.2, dot(normalize(ecNormal), normalize(ecLight)));
}

void main()
{                                       
        ecEye = normalize(-ecPos);      
        vec3 alpha = texture2D(furMap, vec2(gl_TexCoord[0].s * 2.0, gl_TexCoord[0].t * 2.0)).xyz;
        if (alpha.r + alpha.g + alpha.b < 1.5) discard;                 
        gl_FragColor = diffuse(0) * texture2D(diffuseMap, gl_TexCoord[0].st);;
}