vertex shader turns pink on Galaxy S3

Unity Engine
1

Hello ! So as the title says , this shader doesn’t work on Samsung Galaxy S3 (it’s pink ) , it works fine on OnePlus One and Galaxy S4 . I have no error on my console when I play it (used Log Viewer plug-in). I tried deleting the #pragma glsl or #pragma 3.0 it didn’t change a thing. When I comment what’s on my vert function then it’s not pink anymore but off course the movements are not there anymore. Any chance for a solution ? It’s kind of driving me nuts (sorry for the language ). I’m using Unity 5.6.0f3

Here’s the code :

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Homemade/Sky/SkyDisplacementFallback" {
    Properties{
        _Color("Color", Color) = (1,1,1,1)
        _MainTex("Main Texture",2D) = "white" {}
    _Amplitude("Amplitude", Range(0.00,5.00)) = 1.0
        _Speed("Speed", Range(0.,100.)) = 5.0
        _ColorFade("Color Fade",Range(0.0,1.0)) = 0.5
    }
        SubShader{
        LOD 200
        Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }
        Blend SrcAlpha One
        Cull Off
        //ZWrite Off

        Pass{
        CGPROGRAM

        // Use shader model 3.0 target, to get nicer looking lighting
#pragma target 3.0
#pragma glsl

#pragma vertex vert alpha
#pragma fragment frag
#include "UnityCG.cginc"


        uniform sampler2D _MainTex;
    uniform fixed4 _Color;
    uniform float _Speed;
    uniform float _Amplitude;
    uniform float _ColorFade;

    struct v2f {
        float4 pos : SV_POSITION;
        float2 uv : TEXCOORD0;
        UNITY_FOG_COORDS(2)
    };

  
    float grey(float4 color) {
        return 12.92*(0.2126*color.r + 0.7152*color.g + 0.0722*color.b);
    }

    v2f vert(appdata_full v)
    {
        v2f o;
      
        v.vertex.x += 0.11*cos(v.vertex.z + (_CosTime.y*_Speed));
        v.vertex.y += 0.11*cos(v.vertex.z + (_CosTime.y*_Speed));

        float4 height = tex2Dlod(_MainTex, float4(v.texcoord.xy, 0, 0)) *_Amplitude;
        height = grey(height);

        v.vertex.y += height*cos(v.vertex.x + (_SinTime.x*_Speed));
      
        o.uv = v.texcoord;
        o.pos = UnityObjectToClipPos(v.vertex);
        UNITY_TRANSFER_FOG(o, o.pos);
        return o;
    }


    fixed4 frag(v2f i) : SV_Target{
        fixed4 col = _Color;
      float4 texColor = tex2D(_MainTex, i.uv);
      col = 2.0*texColor*_Color*(texColor.a*_ColorFade);

      UNITY_APPLY_FOG(i.fogCoord, col);
      return col;
    }


        ENDCG
    }

    }
        FallBack Off
}

Thank you

2

The Galaxy S3 is an OpenGLES 2.0 device.

3

Should I put #pragma 2.0 instead then ?
I tried putting #pragma 2.0 , my shader is still pink

4

You are trying to read a texture in vertex shader. This is not guaranteed to work in OpenGL ES 2.0 (and my guess is that Galaxy S3 doesn’t support reading textures from vertex shader).

5

Okay so my issue comes from that line

float4 height = tex2Dlod(_MainTex, float4(v.texcoord.xy, 0, 0)) *_Amplitude;

because of that

Thank you !

6

You can try to force the shader to compile in GLSL:
#pragma glsl

edit: sorry, missed the post of yours where you stated that you already tried glsl or target 3.0