Shader returning lots of ambiguous errors

Questions & Answers
1

I have the following code:

Shader "VXR/Car" {
Properties {
	_MainCol ("Colour", Color) = (1,1,1,1)
	_PaintTex ("Paint Texture", 2D) = "" {}
	_PaintCol ("Secondary Colour", Color) = (1,1,1,1)
	_AO ("Baked Ambient Occlusion", 2D) = "white" {}
	_Cube ("Cubemap", CUBE) = "" {}
	_RimPower ("Reflection Strength", Range(0.5,8.0)) = 3.0
	_SpecColor ("Specular Color", Color) = (0.5, 0.5, 0.5, 1)
	_Shininess ("Shininess", Range (0.01, 1)) = 0.078125
	_BadgeTex ("Badge Texture", 2D) = "" {}
}
SubShader {
	Tags { "RenderType" = "Opaque" }

CGPROGRAM
#pragma surface surf BlinnPhong

fixed4 _MainCol;
sampler2D _PaintTex;
fixed4 _PaintCol;
sampler2D _AO;
samplerCUBE _Cube;
float _RimPower;
half _Shininess;
sampler2D _BadgeTex;

struct Input {
	fixed4 uv_MainCol;
	float2 uv_PaintTex;
	fixed4 uv_PaintCol;
	float2 uv_AO;
	float3 worldRefl;
	float3 viewDir;
	float2 uv_BadgeTex;
};

void surf (Input IN, inout SurfaceOutput o) {
	o.Albedo = 1.0 - tex2D (_PaintTex, IN.uv_PaintTex).a;
	o.Albedo *= _MainCol;
	o.Albedo += _PaintCol * tex2D(_PaintTex, IN.uv_PaintTex).a;
	o.Albedo *= -tex2D (_BadgeTex, uv_BadgeTex).a;
	o.Albedo += tex2D (_BadgeTex, uv_BadgeTex).a * tex2D (_BadgeTex, uv_BadgeTex).rgb;
	o.Albedo *= tex2D (_AO, IN.uv_AO).rgb;
	half rim = 1.0 - saturate(dot (normalize(IN.viewDir), o.Normal));
	o.Emission = texCUBE (_Cube, IN.worldRefl) * pow (rim, _RimPower);
	o.Gloss = _SpecColor.a;
	o.Specular = _Shininess;
	o.Alpha = 1.0;
}
ENDCG
}

FallBack "Specular"
}

It was all working until I added _BadgeTex, and then it returned 33 similar errors; Material doesn’t have a — property ‘—’

Any Help would be great, thanks in advance.

2

There’s probably a single real error in the shader, hopefully near the top of the error list. “Missing property” are just Unity pile-on errors, sprayed each frame by the Editor when the shader is broken in a particular way.

I don’t see the error off-hand. Typing a line at a time can help. You might be running into too many texture lookups. Tex2D is expensive, but a real graphics card can handle at least 16. Even so, might be faster and cleaner to get badgeTexture just once: half4 bCol = tex2D(_BadgeTex...); and then o.Albedo+=bCol.a * bCol.rgb; and so on.