Shader turns black and white on Android, but fine in the editor ?

Unity Engine
1

I have a custom fog shader that works great in unity and the editor, but once I deploy to Android (Gear VR, if that makes a difference), it comes out black and white.

This is my main shader for most of the environment, so I get the world in black and white, but the characters are all in color.

I can’t take credit for this shader, it was originally from a windows phone shader to get around the broken fog, but I broke it after trying to get it to fade to black after the fog.
There are 2 color lerps, one adds the fog and works great, but as soon as I add the second one that was supposed to fade to black, I lose all color.

Shader "Custom/Unlit_Fog" {
    Properties {
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _Color ("Fog Color", Color) = (1,1,1,1)
        _FogStart("Fog Start", float) = 40
        _FogEnd("Fog End", float) = 150
       
       
    }
    SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200
       
        CGPROGRAM
        #pragma surface surf Lambert finalcolor:mycolor vertex:myvert

        sampler2D _MainTex;
        uniform half4 _Color;
        uniform half _FogStart;
        uniform half _FogEnd;


        float4 color : COLOR;
        struct Input
        {
            float2 uv_MainTex;
            half Myfog;
        };

        void myvert (inout appdata_full v, out Input data)
        {
            UNITY_INITIALIZE_OUTPUT(Input,data);
            float pos = length(mul (UNITY_MATRIX_MV, v.vertex).xyz);

            float diff = _FogEnd - _FogStart;
            float invDiff = 1.0f / diff;
            data.Myfog = clamp ((_FogEnd - pos) * invDiff, 0.0, 1.0);
        }
        void mycolor (Input IN, SurfaceOutput o, inout fixed4 color)
        {
            fixed3 fogColor = _Color.rgb;
            fixed3 CalcColor = _Color.rgb;

            CalcColor = lerp(fogColor, color.rgb, IN.Myfog);
            CalcColor = lerp((0,0,0,0), CalcColor.rgb, IN.Myfog);
            color.rgb = CalcColor.rgb;


        }

        void surf (Input IN, inout SurfaceOutput o) {
            half4 c = tex2D (_MainTex, IN.uv_MainTex);
            o.Albedo = c.rgb;
            o.Alpha = c.a;
        }
        ENDCG
    }
    FallBack "Diffuse"
}
2

Pretty old thread… have you found a solution?
I have a similar problem with my transparent ‘plasma’ shader which is doing nothing very fancy but takeing 3 textures and combine them together. The result is pure white…

3

I’m sorry, that was a long time ago and I can’t remember how I fixed the problem.

Looking back at the project, the above shader turned into this;

Shader "Custom/Unlit_Fog_2_Black"
{
    Properties {
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _Color("Fog Color", Color) = (1,1,1,1)
        _FogStart("Fog Start", float) = 40
        _FogEnd("Fog End", float) = 150
        _Black("Black_Color", Color) = (0,0,0,1)
      
    }
    SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200
      
        CGPROGRAM
        #pragma surface surf Lambert finalcolor:mycolor vertex:myvert

        sampler2D _MainTex;
        uniform half4 _Color;
        uniform half _FogStart;
        uniform half _FogEnd;
        uniform half4 _Black;


        float4 color : COLOR;
        struct Input
        {
            float2 uv_MainTex;
            half Myfog;
        };

        void myvert (inout appdata_full v, out Input data)
        {
            UNITY_INITIALIZE_OUTPUT(Input,data);
            float pos = length(mul (UNITY_MATRIX_MV, v.vertex).xyz);

            float diff = _FogEnd - _FogStart;
            float invDiff = 1.0f / diff;
            data.Myfog = clamp ((_FogEnd - pos) * invDiff, 0.0, 1.0);
        }
        void mycolor (Input IN, SurfaceOutput o, inout fixed4 color)
        {
            fixed3 fogColor = _Color.rgb;
            fixed3 CalcColor = _Color.rgb;

            CalcColor = lerp(fogColor, color.rgb, IN.Myfog );
            color.rgb = lerp(_Black, CalcColor.rgb, IN.Myfog);

        }

        void surf (Input IN, inout SurfaceOutput o) {
            half4 c = tex2D (_MainTex, IN.uv_MainTex);
            o.Albedo = c.rgb;
            o.Alpha = c.a;
        }
        ENDCG
    }
    FallBack "Diffuse"
}

Hopefully that will help?