Adding Transparency to Custom Unity Shader

Questions & Answers
1

Hello everyone,

i am having problems adding transparency to a custom shader. I have tried many methods and i still couldn’t get it to work.

The main thing is i need the shader to interpolate to a lower alpha value and back without affecting it’s shininess.

I managed to get it to interpolate between textures but that is the maximum of my capabilities.

Please help.

The shader is as follows (without the texture swapping to keep things simple):

Shader "Toon/Shiny" 
{
    Properties 
    {
		_Color ( "Main Color", Color ) = ( 1, 1, 1, 1 )
		_RimColor ( "Rim Color", Color ) = ( 0.97, 0.88, 1, 0.75 )
		_RimPower ( "Rim Power", Float ) = 2.5
		_MainTex ( "Diffuse (RGB) Alpha (A)", 2D ) = "white" {}
		_BumpMap ( "Normal (Normal)", 2D ) = "bump" {}
		_SpecularTex ( "Specular Level (R) Gloss (G) Rim Mask (B)", 2D ) = "gray" {}
		_RampTex ( "Toon Ramp (RGB)", 2D ) = "white" {}
		_Cutoff ( "Alphatest Cutoff", Range( 0, 1 ) ) = 0.5
	}

	SubShader
	{
		Tags { "RenderType" = "Opaque" }
		
		CGPROGRAM
		#pragma surface surf TF2 alphatest:_Cutoff
		#pragma target 3.0

		struct Input
		{
			float2 uv_MainTex;
			float3 worldNormal;
			INTERNAL_DATA
		};
		
		sampler2D _MainTex, _SpecularTex, _BumpMap, _RampTex;
		float4 _RimColor;
		float _RimPower;

		inline fixed4 LightingTF2 ( SurfaceOutput s, fixed3 lightDir, fixed3 viewDir, fixed atten )
		{
			fixed3 h = normalize ( lightDir + viewDir );
			
			fixed NdotL = dot( s.Normal, lightDir ) * 0.5 + 0.5;
			fixed3 ramp = tex2D( _RampTex, float2( NdotL * atten ) ).rgb;
			
			float nh = max ( 0, dot ( s.Normal, h ) );
			float spec = pow ( nh, s.Gloss * 128 ) * s.Specular;
			
			fixed4 c;
			c.rgb = ( ( s.Albedo * ramp * _LightColor0.rgb + _LightColor0.rgb * spec ) * ( atten * 2 ) );
			c.a = s.Alpha;
			return c;
		}

		void surf ( Input IN, inout SurfaceOutput o )
		{
			o.Albedo = tex2D( _MainTex, IN.uv_MainTex ).rgb;
			o.Alpha = tex2D( _MainTex, IN.uv_MainTex ).a;
			o.Normal = UnpackNormal( tex2D( _BumpMap, IN.uv_MainTex ) );
			float3 specGloss = tex2D( _SpecularTex, IN.uv_MainTex ).rgb;
			o.Specular = specGloss.r;
			o.Gloss = specGloss.g;
			
			half3 rim = pow( max( 0, dot( float3( 0, 1, 0 ), WorldNormalVector ( IN, o.Normal ) ) ), _RimPower ) * _RimColor.rgb * _RimColor.a * specGloss.b;
			o.Emission = rim;
		}
		ENDCG
	}
	Fallback "Transparent/Cutout/Bumped Specular"
}
2

You need to start with changing this:

Tags { “RenderType” = “Opaque” }

to

Tags { “RenderType” = “Transparent” }