GLSL link error: ERROR: Input of fragment shader 'vs_TEXCOORD0' not written by vertex shader

Questions & Answers
1

Shader “Custom/texture” {
Properties{
_MainTex (“Albedo (RGB)”, 2D) = “white” {}
}
SubShader {
Pass{
Tags { “RenderType”=“Opaque” }
LOD 200

		CGPROGRAM
		// Physically based Standard lighting model, and enable shadows on all light types
		#pragma vertex vert
		#pragma fragment frag

		sampler2D _MainTex;

		struct Output {
			float4 color : COLOR;
		};

		Output frag(float2 texCoord : TEXCOORD0)
		{
			Output OUT;
			OUT.color = tex2D(_MainTex, texCoord);
			return OUT;
		}

		Output vert() 
		{
			Output OUT;
			return OUT;
		}
		ENDCG
	}
	}
}

It doesn’t specify a line which it breaks on but I assume it’s on line 24.

2

you have to initialize your Output OUT in your vertex shader.
you may consider to NOT use the same “Output” struct for vertex and fragment shader.