My custom shader is showing up black

Unity Engine
1

I just upgraded to the Unity 3.4 trial and am moving my game to be android capable. I have been developing my game on windows with the free version of Unity until I got the game at a level I would be happy releasing a lite version, I’m spending the time between Thanksgiving and Christmas burning the midnight oil to get a lite version ready and am hoping to buy Android after the new year. The Shader was working just fine when doing a PC version on Unity 3.something but now everything I have with this shader on just appear black

My shader takes 3 textures, splits two into seperate channels for various uses. I know little to nothing about shaders and have just been piecing this one together with limited help some assistance from STrumpys Shader Editor.

//Color and Vector properties map to float4 variables.
//Range and Float properties map to float variables.
//Texture properties map to sampler2D variables for regular (2D) textures.

Shader "Custom/UltraShader" {
	Properties {
		_MainTex ("BaseTex (RGB)", 2D) = "white" {}
		_TintMap("TintMap (RGB)", 2D) = "white" {} //R=Primary, B=Secondary
		_EmOpSpec("_EmOpSpec", 2D) = "white" {} //R=Emission, B=Opacity, G=Specularity
		_PrimaryTint ("PrimaryTint", Color) = (1.0, 1.0, 1.0, 1.0)
		_SecondaryTint ("SecondaryTint", Color) = (1.0, 1.0, 1.0, 1.0)
		_Emission("_Emission", Range(0,1) ) = 0
		_Alpha("_Alpha", Range(0,1) ) = 1
		
	}
	SubShader {
		Tags { 
		"Queue"="Transparent"
		"IgnoreProjector"="True"
		"RenderType"="Opaque" 
		}
		LOD 200
		
Cull Off
ZWrite On
ZTest LEqual
ColorMask RGBA
Blend SrcAlpha OneMinusSrcAlpha
Lighting Off
		
		CGPROGRAM
		#pragma surface surf BlinnPhong

		sampler2D _MainTex;
		sampler2D _TintMap;
		sampler2D _EmOpSpec;
		float4 _PrimaryTint;
		float4 _SecondaryTint;
		float _Emission;
		float _Alpha;
		
		struct Input {
			float2 uv_MainTex;
		};

		void surf (Input IN, inout SurfaceOutput o) {
		//Main Texture
		half4 diffuse = tex2D (_MainTex, IN.uv_MainTex);
		
		//Tint map and Split of Tint
		float4 TintMap=tex2D(_TintMap,IN.uv_MainTex);
		float4 Split0=TintMap;

		//Setup of Primary
		float4 SplatAlpha0=_PrimaryTint.w;
		float4 Invert4= float4(1.0, 1.0, 1.0, 1.0) - Split0.x;
		float4 Invert5= float4(1.0, 1.0, 1.0, 1.0) - _PrimaryTint;
		half4 primaryTint = SplatAlpha0*(Invert5 * Invert4);

		//Setup of Secondary
		float4 Invert6= float4(1.0, 1.0, 1.0, 1.0) - Split0.y;
		float4 Invert7= float4(1.0, 1.0, 1.0, 1.0) - _SecondaryTint;
		half4 secondaryTint = SplatAlpha0*(Invert7 * Invert6);
		
		
		//Emission
		float4 SOEMap=tex2D(_EmOpSpec,IN.uv_MainTex);
		float4 Split1=SOEMap;
		float4 Invert8= float4(1.0, 1.0, 1.0, 1.0) - Split1.x;
		float4 Multiply4 = _Emission.xxxx * Invert8;
		float4 Multiply5 = _PrimaryTint * Multiply4;
		
		//Alpha
		float4 Subtract1=_Alpha - Split1.y;

		//Specular
				
		//Gloss
		
		//Apply Tints
		half4 c = diffuse - (primaryTint + secondaryTint);
												
			o.Albedo = c.rgb;
			o.Emission = Multiply5;
			o.Alpha = Subtract1;

		}
		ENDCG
	} 
	Fallback "VertexLit"
}

Any help would be great.

2

Slight Update. I found this thread Shader Fallback changed in 3.4? - Questions & Answers - Unity Discussions and if I add

_Color ("Main Color", Color) = (1,1,1,1)

line of code I can see the diffuse texture but nothing else on the shader works.

3

If the shader is only rendering black when you run it on Android devices, then it could be like what I was running into. I wrote about my solution here: Favela || Parks: Unity Quirks.

Good luck.

4

try lowering your fallback to diffuse or mobile/diffuse