Tone Shader

Tone Shading:

Tool: ATI Rendermonkey

Language: HLSL

Concept:  

Basically, this technique can be done by two pass. First, I create a basic infinite light shading to render to texture. The rendertarget uses the alpha to store the shading result. In the final pass, I use a 2D texture which is my "tone" map to lerp the last pass result. Done! 

Key Code:

pass0:

float4 ps_main(float3 pos : TEXCOORD1, float3 nrm : TEXCOORD2) : COLOR

{

    float  diffuse = min(1.0,max(0,dot(-Light_Direction,nrm)));

    diffuse = pow(diffuse,5);

    diffuse = (diffuse*4)/3.0; 

    float4 Col = float4(1,1,1,diffuse);

    return Col;

}

Pass1:

float4 ps_main(float2 tex: TEXCOORD0) : COLOR0

{   

   float4 color;

   float4 base = tex2D(Texture0,tex);

   float4 hatch = tex2D(Texture1, tex);

   color = lerp(hatch , base, base.a) ;

   return color * base; 

}