Greenscreen shader

[megaman54]

So i want to create a shader which takes an image file (.png etc) and checks for specified pixel color and makes those pixels totally transparent. I kinda know how i would write the lua script but the HLSL language for shader is pretty much new to me so i was hoping if someone more experienced in HLSL would guide me a little. Thx

[botder]

texture texture0; 
  
sampler Sampler0 = sampler_state 
{ 
    Texture = (texture0); 
}; 
  
struct PSInput 
{ 
    float2 TexCoord : TEXCOORD0; 
}; 
  
float4 PixelShader_Background(PSInput PS) : COLOR0 
{ 
    float4 colors = tex2D(Sampler0, PS.TexCoord); 
    if (colors.g == 1 && colors.r == 0 && colors.b == 0) { 
        colors.a = 0; 
    } 
    return colors; 
} 
  
technique complercated 
{ 
    pass P0 
    { 
        PixelShader = compile ps_2_0 PixelShader_Background(); 
    } 
} 
  
technique simple 
{ 
    pass P0 
    { 
        Texture[0] = texture0; 
    } 
} 
  

[megaman54]

texture texture0; 
  
sampler Sampler0 = sampler_state 
{ 
    Texture = (texture0); 
}; 
  
struct PSInput 
{ 
    float2 TexCoord : TEXCOORD0; 
}; 
  
float4 PixelShader_Background(PSInput PS) : COLOR0 
{ 
    float4 colors = tex2D(Sampler0, PS.TexCoord); 
    if (colors.g == 1 && colors.r == 0 && colors.b == 0) { 
        colors.a = 0; 
    } 
    return colors; 
} 
  
technique complercated 
{ 
    pass P0 
    { 
        PixelShader = compile ps_2_0 PixelShader_Background(); 
    } 
} 
  
technique simple 
{ 
    pass P0 
    { 
        Texture[0] = texture0; 
    } 
} 
  

Thanks for the shader code! Now i can get this script started properly

[Ren_712]

Png with an alpha channel should work nicely as is. If you add the shader to world texture then don't forget to add AlphaRef = 1; AlphaBlendEnable = True; to your pass.