Toon shader with Transparency

Hi, this is pretty easy to do.

What you need to do is set a blending mode (in this case srcAlpha oneMinusSrcAlpha) change the render type to transparent, and change he queue that it is rendering in. You then need to output the alpha to use also when writing the fragment.

Here is the modified shader, have a look at how it differs from the original and you should be able to figure out what you want to do from here.

Code (csharp):

1.  
2.     SubShader {
3.         Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
4.         Pass {
5.             Name "BASE"
6.             Cull Off
7.             Blend SrcAlpha OneMinusSrcAlpha
8.            
9.             CGPROGRAM
10.             #pragma vertex vert
11.             #pragma fragment frag
12.             #pragma fragmentoption ARB_precision_hint_fastest
13.  
14.             #include "UnityCG.cginc"
15.  
16.             sampler2D _MainTex;
17.             samplerCUBE _ToonShade;
18.             float4 _MainTex_ST;
19.             float4 _Color;
20.  
21.             struct appdata {
22.                 float4 vertex : POSITION;
23.                 float2 texcoord : TEXCOORD0;
24.                 float3 normal : NORMAL;
25.             };
26.            
27.             struct v2f {
28.                 float4 pos : POSITION;
29.                 float2 texcoord : TEXCOORD0;
30.                 float3 cubenormal : TEXCOORD1;
31.             };
32.  
33.             v2f vert (appdata v)
34.             {
35.                 v2f o;
36.                 o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
37.                 o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
38.                 o.cubenormal = mul (UNITY_MATRIX_MV, float4(v.normal,0));
39.                 return o;
40.             }
41.  
42.             float4 frag (v2f i) : COLOR
43.             {
44.                 float4 col = _Color * tex2D(_MainTex, i.texcoord);
45.                 float4 cube = texCUBE(_ToonShade, i.cubenormal);
46.                 return float4(2.0f * cube.rgb * col.rgb, col.a);
47.             }
48.             ENDCG          
49.         }
50.     }
51.