CG Shader problem on iPad

Unity Engine
1

Hi,

i’m currently on port our first Unity game to iPad and i have some problems with my cg shader. On mac or pc all works fine, but iPad shows me all objects in black. Alpha works. Here is my shader:

Shader "Astroslugs/Custom Slugball" {
Properties {
	_Color ("Main Color", Color) = (0.5,0.5,0.5,1)
	_Emission ("Emmisive Color", Color) = (0,0,0,0)
	_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
	_SlugColor ("Slugball Color", Color) = (1.0,0.0,0.0,1)
	_SlugMask ("Slugball mask (A)", 2D) = "white" {}
	_GlibberColor ("Glibber Color", Color) = (1.0,1.0,1.0,1)
	_Glibber ("Glibber (RGB) Trans (A)", 2D) = "white" {}
	_MaskRange ("Range", Range(0.0, 1.0)) = 1.0
}
SubShader {
		Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
		ZWrite Off
		Alphatest Greater 0
		Blend SrcAlpha OneMinusSrcAlpha
		
		CGPROGRAM
		#pragma surface surf BlinnPhong alpha 
		
		struct Input {
			float4 color : COLOR;
			float2 uv_MainTex;
			float2 uv_SlugMask;
			float2 uv_Glibber;
		};
		sampler2D _MainTex;
		sampler2D _SlugMask;
		sampler2D _Glibber;
		float4 _Color;
		float4 _Emission;
		float4 _SlugColor;
		float4 _GlibberColor;
		float _MaskRange;
		void surf (Input IN, inout SurfaceOutput o) {
			o.Alpha = 1.0;
			
			// MainTex
			float4 MainTex =  tex2D(_MainTex, IN.uv_MainTex).rgba;
			float4 primary = (255,255,255,1)*3;
			MainTex *= primary;
			MainTex *= (_Color)*2;
			float MainAlpha = tex2D(_MainTex, IN.uv_MainTex).a;

			// SlugMask
			float4 SlugTex = tex2D(_SlugMask, IN.uv_SlugMask).rgba;
			_SlugColor *= primary*1.75;
			SlugTex *= _SlugColor;
			float SlugAlpha = tex2D(_SlugMask, IN.uv_SlugMask).a;
			
			//Glitter
			float4 GlitterTex = tex2D(_Glibber, IN.uv_Glibber).rgba;
			GlitterTex *= primary * 2;
			float GlitterAlpha =  tex2D(_Glibber, IN.uv_Glibber).a;
			
			
			//Output
			float4 pass1 = lerp(MainTex, SlugTex, SlugAlpha * _MaskRange);
			//float4 pass2 = lerp(pass1, GlitterTex, GlitterAlpha * _MaskRange);
			o.Albedo = lerp(pass1, GlitterTex, GlitterAlpha * _MaskRange);
			o.Alpha = MainTex.a + (SlugAlpha * _MaskRange)  *_Color.w;
			
		}
		ENDCG
	} 
}

I have no idea what i’m doing wrong here. Can it be, iPad can’t handle #pragma surface surf stuff?
I hope you have any ideas, i’m stuck here.

2

surf shaders work but they are for pixel light and pixel lights are extremly costly if used incorrectly.
Do you use other things like lightmap and alike.

Does it report any error in the console when running on the device?

3

Hi dreamora,

no i’m not using lights or lightmap. The material/shader is self illuminated. Console in xcode shows me no errors.