Question by davidmurdoch · May 19, 2017 at 10:38 PM · shader shaders shader programming

Mobile Shader that swaps in an image

I'm using a shader similar to the following. It works on desktop but not on Android (2013 Moto X and some others tested).

 Shader "Infinity Code/Online Maps/Tileset" 
 {
     Properties 
     {
         _MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
 
         _GrassTexture("Grass Texture", 2D) = "green" {}
     }
 
     SubShader 
     {
         Tags {"Queue"="Transparent-100" "IgnoreProjector"="True" "RenderType"="Transparent"}
         LOD 200
 
         CGPROGRAM
         #pragma surface surf Lambert alpha
 
         sampler2D _MainTex;
         sampler2D _GrassTexture;
 
         struct Input 
         {
             float2 uv_MainTex;
         };
 
         void surf (Input IN, inout SurfaceOutput o) 
         {
             o.Albedo = tex2D(_GrassTexture, IN.uv_MainTex);
             o.Alpha = 1;
                 }
         ENDCG
     }
 
     Fallback "Transparent/VertexLit"
 }

_GrassTexture is set to an image file that should be used instead of what's in the IN. An desktop this works great. On Android it renders just grey.

Is this sort of thing just not going to be possible on Android or am I doing something wrong?

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