How to make a Transparent/Diffuse shader Unlit?

Unity Engine
1

Hello,

I’m in need of making this shader that I have unlit but so far my copy/paste attempts are failing to put both of them together. Any shader masters around to show me the way?

Shader "Transparent/Diffuse on top" {
Properties {
	_Color ("Main Color", Color) = (1,1,1,1)
	_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
}

SubShader 
{
	Ztest NotEqual
	Tags {"Queue"="Geometry+1" "IgnoreProjector"="True" "RenderType"="Transparent"}
	LOD 200

	CGPROGRAM
	#pragma surface surf Lambert alpha
	
	sampler2D _MainTex;
	fixed4 _Color;
	
	struct Input {
		float2 uv_MainTex;
	};
	
	void surf (Input IN, inout SurfaceOutput o) {
		fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
		o.Albedo = c.rgb;
		o.Alpha = c.a;
	}
	ENDCG
	}
	
	Fallback "Transparent/VertexLit"
}
2

What do you mean by “unlit”? Diffuse is a descriptor of reflectance, and doesn’t mean anything without light.

3

Yeah, but more often than not, in game graphics, “diffuse” is used to mean “albedo”.

What you’re after, though, is far simpler than a surface shader. This should (untested) work;

Shader "Transparent/Diffuse on top" {

	Properties {

		_Color ("Main Color", Color) = (1,1,1,1)

		_MainTex ("Diffuse (RGB) Alpha (A)", 2D) = "white" {}

	}



	SubShader {

		Blend SrcAlpha OneMinusSrcAlpha

		Tags { "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent"}

		LOD 200

		

		Pass {

			CGPROGRAM

				#pragma vertex vert

				#pragma fragment frag

				#pragma multi_compile_builtin

				#pragma fragmentoption ARB_precision_hint_fastest

				

				#include "UnityCG.cginc"

				

				struct v2f

				{

					float4	pos : SV_POSITION;

					float2	uv : TEXCOORD0;

				}; 



				v2f vert (appdata_base v)

				{

					v2f o;

					o.pos = mul(UNITY_MATRIX_MVP, v.vertex);

					o.uv = v.texcoord.xy;

					return o;

				}

				

				sampler2D _MainTex;

				float4 _Color;



				fixed4 frag(v2f i) : COLOR

				{

					fixed4 result = tex2D(_MainTex, i.uv) * _Color;

					return result;

				}

			ENDCG

		}

	}

	FallBack "Transparent/Cutout/VertexLit"

}
1 Like
4

thanks, i’ll give it ago. I was messing around adding unlit code to a diffuse shader with poor results.