Geometry shader template for Unity. Creates boilerplate code for a simple geometry shader.

84-Shader__Geometry Shader-NewGeomShader.shader.txt

// This is a script template to create a simple geometry shader in Unity.
// Place this file at the following location: [Unity Editor Path]\Editor\Data\Resources\ScriptTemplates

Shader "Custom/#NAME#"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		LOD 100

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma geometry geom
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
			};

			sampler2D _MainTex;
			float4 _MainTex_ST;
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			[maxvertexcount(3)]
			void geom (triangle v2f input[3], inout TriangleStream<v2f> output)
			{
				v2f o = (v2f)0;

				for(int i = 0; i < 3; i++)
				{
					o.vertex = input[i].vertex;
					o.uv = input[i].uv;
					output.Append(o);
				}
				output.RestartStrip();

			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 col = tex2D(_MainTex, i.uv);
				// apply fog
				UNITY_APPLY_FOG(i.fogCoord, col);
				return col;
			}
			ENDCG
		}
	}
}