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I've been puzzling with this for a long time and everything I try fails for another reason.
Shader "MapLitAlpha"
{
Properties
{
_Color("Main Color", Color) = (1,1,1,1)
_MainTex("Base (RGB) Tranparency (A)", 2D) = "gray" {}
_Specularity("Specularity (RGB) Emission (A)", 2D) = "gray" {}
_Light("Lighting (RGB)", 2D) = "gray" {}
_Cutoff("Alpha cutoff", Float) = 0.5
_LightColor("Fake Lighting", Color) = (0.5,0.5,0.5,0.5)
}
SubShader
{
Tags
{
"Queue"="Transparent"
"IgnoreProjector"="True"
"RenderType"="TransparentCutout"
}
Cull Back
ZWrite On
ZTest LEqual
ColorMask RGBA
Fog{Mode Off}
CGPROGRAM
#pragma surface surf SimpleLambert nolightmap noforwardadd approxview halfasview alpha decal:blend vertex:vert
//#pragma target 2.0
// Warning: Modified: don't use Strumpy anymore!
float4 _Color;
sampler2D _MainTex;
sampler2D _Specularity;
sampler2D _Light;
float _Cutoff;
struct EditorSurfaceOutput {
half3 Albedo;
half3 Normal;
half3 Emission;
half Specular;
half Alpha;
//half3 Gloss;
//half4 Custom;
};
half4 LightingSimpleLambert (EditorSurfaceOutput s, half3 lightDir, half atten) {
half NdotL = dot (s.Normal, lightDir);
half4 c;
c.rgb = s.Albedo * _LightColor0.rgb * (NdotL * atten * 2);
c.a = s.Alpha;
return c;
}
struct Input {
float2 uv_MainTex;
float2 uv_Specularity;
float4 screenPos;
float depth;
};
void vert (inout appdata_full v, out Input o)
{
v.tangent = float4(1,0,0,0);
// Front is darker than back
float depthFactor = 0.4 - ( _WorldSpaceCameraPos.z - mul(_Object2World, v.vertex).z )*0.2;
o.depth = depthFactor;
// Init to fix dx11 errors
o.screenPos = float4(0,0,0,0);
o.uv_Specularity = float2(0,0);
o.uv_MainTex = float2(0,0);
}
void surf (Input IN, inout EditorSurfaceOutput o)
{
float4 Tex2D0 = tex2D(_MainTex,(IN.uv_MainTex.xyxy).xy);
float4 Albedo = Tex2D0 * _Color;
float4 Tex2D2 = tex2D(_Specularity,(IN.uv_Specularity.xyxy).xy);
// Calculate sizes and margin
float2 Size = float2(2048, 2048);
float2 Margin = (Size - _ScreenParams.xy)*0.5;
Margin /= Size;
// Map back to texture
float2 SamplePos = lerp(Margin, 1-Margin, IN.screenPos.xy);
float4 Tex2D1 = tex2D(_Light,SamplePos);
float4 Emission = Tex2D1 * 8;
Emission *= Tex2D2.a;
Emission *= Albedo;
o.Albedo = Albedo;
o.Emission = IN.depth*Emission;
o.Normal = float3(0.0,0.0,1.0);
o.Alpha = Tex2D0.a;
}
ENDCG
}
Fallback "Transparent/Cutout/Diffuse"
}