Unity Shader Bool Property Example

Toggle.shader

Shader "Custom/ToggleTest" {

	Properties{
		_BackgroundTex("Background Texture", 2D) = "white"{}
		[Toggle(USE_TEXTURE)] _UseTexture("Use Texture", Float) = 0
	}

	SubShader{
		Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }

		CGINCLUDE
		#pragma target 5.0
		
		#pragma shader_feature USE_TEXTURE

		#include "UnityCG.cginc"

		sampler2D _BackgroundTex;

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

		struct v2f {
			float4 pos : SV_POSITION;
			float2 uv : TEXCOORD0;
		};

		v2f vert(appdata IN) {
			v2f OUT;

			OUT.pos = UnityObjectToClipPos(IN.vertex);
			OUT.uv = IN.uv;

			return OUT;
		}

		fixed4 frag(v2f IN) : SV_Target{

			float2 uv = IN.uv;
      
      #ifdef USE_TEXTURE
			  return fixed4(tex2D(_BackgroundTex, uv).xyz, alpha);
      #else
			  return fixed4(0, 1, 1, 1);
      #endif
			
		}

		ENDCG

		Pass {
			Blend SrcAlpha OneMinusSrcAlpha
			Cull Off

			CGPROGRAM

			#pragma vertex vert
			#pragma fragment frag

			ENDCG
		}

	}
}