koobas.hobune.stream
Unlit greyscale shader
I want to make a shader that show a unlit transparent texture with greyscale effect over a mesh without normals.
I try with a code like this:
SubShader {
Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
LOD 200
CGPROGRAM
#pragma surface surf Lambert alpha
sampler2D _MainTex;
struct Input {
float2 uv_MainTex;
};
void surf (Input IN, inout SurfaceOutput o) {
half4 c = tex2D(_MainTex, IN.uv_MainTex);
o.Albedo = dot(c.rgb, float3(0.3, 0.59, 0.11));
o.Alpha = c.a;
}
ENDCG
}
But this approach use Lambert light model, and I need unlit result for mesh that haven't normals.
Any idea? Thanks!
Best Answer
I've written another shader that has the same result. This should not give you the warning.
Shader "Unlit/GreyScale" {
Properties {
_MainTex ("Texture", 2D) = "white" { }
}
SubShader {
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
sampler2D _MainTex;
struct v2f {
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
};
float4 _MainTex_ST;
v2f vert (appdata_base v)
{
v2f o;
o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
o.uv = TRANSFORM_TEX (v.texcoord, _MainTex);
return o;
}
half4 frag (v2f i) : COLOR
{
half4 texcol = tex2D (_MainTex, i.uv);
texcol.rgb = dot(texcol.rgb, float3(0.3, 0.59, 0.11));
return texcol;
}
ENDCG
}
}
Fallback "VertexLit"
}
Cheers ;)
Please mark answer as correct, so other people can also see the solution. Thanks
