Yet another alpha channel / transparency issue

The goal: Have the shader support both clipping of Objects and transparency.

First i must apologize. I know people have asked how to add transparency to a shader a hundred times before but I cannot for the life of me get it to work.

I'm working on a Project based on this blog post:
http://www.toxicfork.com/194/per-object-clipping-planes-shader-in-unity3d-5#comment-39481

The shader works wonders at clipping Objects and helps me a lot. However adding transparency is my achilles heel.

From what i've found, most people seem to solve their issues by adding tags like:

Code (Code):

1. Tags { "RenderType" = "Transparent" "Queue" = "Transparent" }

and using a function that looks like this:

Code (CSharp):

1. void surf (Input IN, inout SurfaceOutput o) {
2.       o.Albedo = _Color.rgb;
3.       o.Emission = _Color.rgb;
4.       o.Alpha = _Color.a;
5.     }

However the shader in question don't have any functions like that. Between the different SubShaders and all the Passes and #pragmas i don't know how to add such functionality.

Here is the shader I'm working on. Unmolested.

Code (CSharp):

1. Shader "Custom/StandardClippable" {
2.     Properties
3.     {
4.         _Color("Color", Color) = (1,1,1,1)
5.         _MainTex("Albedo", 2D) = "white" {}
6.        
7.         _Cutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5
8.  
9.         _Glossiness("Smoothness", Range(0.0, 1.0)) = 0.5
10.         [Gamma] _Metallic("Metallic", Range(0.0, 1.0)) = 0.0
11.         _MetallicGlossMap("Metallic", 2D) = "white" {}
12.  
13.         _BumpScale("Scale", Float) = 1.0
14.         _BumpMap("Normal Map", 2D) = "bump" {}
15.  
16.         _Parallax ("Height Scale", Range (0.005, 0.08)) = 0.02
17.         _ParallaxMap ("Height Map", 2D) = "black" {}
18.  
19.         _OcclusionStrength("Strength", Range(0.0, 1.0)) = 1.0
20.         _OcclusionMap("Occlusion", 2D) = "white" {}
21.  
22.         _EmissionColor("Color", Color) = (0,0,0)
23.         _EmissionMap("Emission", 2D) = "white" {}
24.        
25.         _DetailMask("Detail Mask", 2D) = "white" {}
26.  
27.         _DetailAlbedoMap("Detail Albedo x2", 2D) = "grey" {}
28.         _DetailNormalMapScale("Scale", Float) = 1.0
29.         _DetailNormalMap("Normal Map", 2D) = "bump" {}
30.  
31.         [Enum(UV0,0,UV1,1)] _UVSec ("UV Set for secondary textures", Float) = 0
32.  
33.         // UI-only data
34.         [HideInInspector] _EmissionScaleUI("Scale", Float) = 0.0
35.         [HideInInspector] _EmissionColorUI("Color", Color) = (1,1,1)
36.  
37.         // Blending state
38.         [HideInInspector] _Mode ("__mode", Float) = 0.0
39.         [HideInInspector] _SrcBlend ("__src", Float) = 1.0
40.         [HideInInspector] _DstBlend ("__dst", Float) = 0.0
41.         [HideInInspector] _ZWrite ("__zw", Float) = 1.0
42.  
43.         _planePos    ("Clipping Plane Position",    Vector)    = ( 0, 0, 0, 1 )
44.         _planePos2    ("Clipping Plane Position 2",    Vector)    = ( 0, 0, 0, 1 )
45.         _planePos3    ("Clipping Plane Position 3",    Vector)    = ( 0, 0, 0, 1 )
46.  
47.         _planeNorm    ("Clipping Plane Normal",    Vector)    = ( 0, 1, 0, 1 )
48.         _planeNorm2    ("Clipping Plane Normal 2",    Vector)    = ( 0, 1, 0, 1 )
49.         _planeNorm3    ("Clipping Plane Normal 3",    Vector)    = ( 0, 1, 0, 1 )
50.     }
51.  
52.     CGINCLUDE
53.         #define UNITY_SETUP_BRDF_INPUT MetallicSetup
54.     ENDCG
55.  
56.     SubShader
57.     {
58.         Tags { "RenderType"="Opaque" "PerformanceChecks"="False" }
59.         LOD 300
60.    
61.  
62.         // ------------------------------------------------------------------
63.         //  Base forward pass (directional light, emission, lightmaps, ...)
64.         Pass
65.         {
66.             Name "FORWARD"
67.             Tags { "LightMode" = "ForwardBase" }
68.  
69.             Blend [_SrcBlend] [_DstBlend]
70.             ZWrite [_ZWrite]
71.  
72.             CGPROGRAM
73.             #pragma target 3.0
74.             // TEMPORARY: GLES2.0 temporarily disabled to prevent errors spam on devices without textureCubeLodEXT
75.             #pragma exclude_renderers gles
76.            
77.             // -------------------------------------
78.                    
79.             #pragma shader_feature _NORMALMAP
80.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
81.             #pragma shader_feature _EMISSION
82.             #pragma shader_feature _METALLICGLOSSMAP
83.             #pragma shader_feature ___ _DETAIL_MULX2
84.             #pragma shader_feature _PARALLAXMAP
85.            
86.             #pragma multi_compile_fwdbase
87.             #pragma multi_compile_fog
88.                
89.             #pragma vertex vertForwardBase
90.             #pragma fragment fragForwardBase
91.  
92.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
93.  
94.             #include "standard_clipped.cginc"
95.  
96.             ENDCG
97.         }
98.         // ------------------------------------------------------------------
99.         //  Additive forward pass (one light per pass)
100.         Pass
101.         {
102.             Name "FORWARD_DELTA"
103.             Tags { "LightMode" = "ForwardAdd" }
104.             Blend [_SrcBlend] One
105.             Fog { Color (0,0,0,0) } // in additive pass fog should be black
106.             ZWrite Off
107.             ZTest LEqual
108.  
109.             CGPROGRAM
110.             #pragma target 3.0
111.             // GLES2.0 temporarily disabled to prevent errors spam on devices without textureCubeLodEXT
112.             #pragma exclude_renderers gles
113.  
114.             // -------------------------------------
115.  
116.            
117.             #pragma shader_feature _NORMALMAP
118.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
119.             #pragma shader_feature _METALLICGLOSSMAP
120.             #pragma shader_feature ___ _DETAIL_MULX2
121.             #pragma shader_feature _PARALLAXMAP
122.            
123.             #pragma multi_compile_fwdadd_fullshadows
124.             #pragma multi_compile_fog
125.            
126.             #pragma vertex vertForwardAdd
127.             #pragma fragment fragForwardAdd
128.  
129.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
130.  
131.             #include "standard_clipped.cginc"
132.  
133.             ENDCG
134.         }
135.         // ------------------------------------------------------------------
136.         //  Shadow rendering pass
137.         Pass {
138.             Name "ShadowCaster"
139.             Tags { "LightMode" = "ShadowCaster" }
140.            
141.             ZWrite On ZTest LEqual
142.  
143.             CGPROGRAM
144.             #pragma target 3.0
145.             // TEMPORARY: GLES2.0 temporarily disabled to prevent errors spam on devices without textureCubeLodEXT
146.             #pragma exclude_renderers gles
147.            
148.             // -------------------------------------
149.  
150.  
151.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
152.             #pragma multi_compile_shadowcaster
153.  
154.             #pragma vertex vertShadowCaster
155.             #pragma fragment fragShadowCaster
156.  
157.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
158.  
159.             #include "standard_shadow_clipped.cginc"
160.  
161.             ENDCG
162.         }
163.         // ------------------------------------------------------------------
164.         //  Deferred pass
165.         Pass
166.         {
167.             Name "DEFERRED"
168.             Tags { "LightMode" = "Deferred" }
169.  
170.             CGPROGRAM
171.             #pragma target 3.0
172.             // TEMPORARY: GLES2.0 temporarily disabled to prevent errors spam on devices without textureCubeLodEXT
173.             #pragma exclude_renderers nomrt gles
174.            
175.  
176.             // -------------------------------------
177.  
178.             #pragma shader_feature _NORMALMAP
179.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
180.             #pragma shader_feature _EMISSION
181.             #pragma shader_feature _METALLICGLOSSMAP
182.             #pragma shader_feature ___ _DETAIL_MULX2
183.             #pragma shader_feature _PARALLAXMAP
184.  
185.             #pragma multi_compile ___ UNITY_HDR_ON
186.             #pragma multi_compile LIGHTMAP_OFF LIGHTMAP_ON
187.             #pragma multi_compile DIRLIGHTMAP_OFF DIRLIGHTMAP_COMBINED DIRLIGHTMAP_SEPARATE
188.             #pragma multi_compile DYNAMICLIGHTMAP_OFF DYNAMICLIGHTMAP_ON
189.            
190.             #pragma vertex vertDeferred
191.             #pragma fragment fragDeferred
192.  
193.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
194.  
195.             #include "standard_clipped.cginc"
196.  
197.             ENDCG
198.         }
199.  
200.         // ------------------------------------------------------------------
201.         // Extracts information for lightmapping, GI (emission, albedo, ...)
202.         // This pass it not used during regular rendering.
203.         Pass
204.         {
205.             Name "META"
206.             Tags { "LightMode"="Meta" }
207.  
208.             Cull Off
209.  
210.             CGPROGRAM
211.             #pragma vertex vert_meta
212.             #pragma fragment frag_meta
213.  
214.             #pragma shader_feature _EMISSION
215.             #pragma shader_feature _METALLICGLOSSMAP
216.             #pragma shader_feature ___ _DETAIL_MULX2
217.  
218.             #include "UnityStandardMeta.cginc"
219.             ENDCG
220.         }
221.     }
222.  
223.     SubShader
224.     {
225.         Tags { "RenderType"="Opaque" "PerformanceChecks"="False" }
226.         LOD 150
227.  
228.         // ------------------------------------------------------------------
229.         //  Base forward pass (directional light, emission, lightmaps, ...)
230.         Pass
231.         {
232.             Name "FORWARD"
233.             Tags { "LightMode" = "ForwardBase" }
234.  
235.             Blend [_SrcBlend] [_DstBlend]
236.             ZWrite [_ZWrite]
237.  
238.             CGPROGRAM
239.             #pragma target 2.0
240.            
241.             #pragma shader_feature _NORMALMAP
242.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
243.             #pragma shader_feature _EMISSION
244.             #pragma shader_feature _METALLICGLOSSMAP
245.             #pragma shader_feature ___ _DETAIL_MULX2
246.             // SM2.0: NOT SUPPORTED shader_feature _PARALLAXMAP
247.  
248.             #pragma skip_variants SHADOWS_SOFT DIRLIGHTMAP_COMBINED DIRLIGHTMAP_SEPARATE
249.  
250.             #pragma multi_compile_fwdbase
251.             #pragma multi_compile_fog
252.    
253.             #pragma vertex vertForwardBase
254.             #pragma fragment fragForwardBase
255.  
256.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
257.  
258.             #include "standard_clipped.cginc"
259.  
260.             ENDCG
261.         }
262.         // ------------------------------------------------------------------
263.         //  Additive forward pass (one light per pass)
264.         Pass
265.         {
266.             Name "FORWARD_DELTA"
267.             Tags { "LightMode" = "ForwardAdd" }
268.             Blend [_SrcBlend] One
269.             Fog { Color (0,0,0,0) } // in additive pass fog should be black
270.             ZWrite Off
271.             ZTest LEqual
272.            
273.             CGPROGRAM
274.             #pragma target 2.0
275.  
276.             #pragma shader_feature _NORMALMAP
277.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
278.             #pragma shader_feature _METALLICGLOSSMAP
279.             #pragma shader_feature ___ _DETAIL_MULX2
280.             // SM2.0: NOT SUPPORTED shader_feature _PARALLAXMAP
281.             #pragma skip_variants SHADOWS_SOFT
282.            
283.             #pragma multi_compile_fwdadd_fullshadows
284.             #pragma multi_compile_fog
285.            
286.             #pragma vertex vertForwardAdd
287.             #pragma fragment fragForwardAdd
288.  
289.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
290.  
291.             #include "standard_clipped.cginc"
292.  
293.             ENDCG
294.         }
295.         // ------------------------------------------------------------------
296.         //  Shadow rendering pass
297.         Pass {
298.             Name "ShadowCaster"
299.             Tags { "LightMode" = "ShadowCaster" }
300.            
301.             ZWrite On ZTest LEqual
302.  
303.             CGPROGRAM
304.             #pragma target 2.0
305.  
306.             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
307.             #pragma skip_variants SHADOWS_SOFT
308.             #pragma multi_compile_shadowcaster
309.  
310.             #pragma vertex vertShadowCaster
311.             #pragma fragment fragShadowCaster
312.  
313.             #pragma multi_compile __ CLIP_ONE CLIP_TWO CLIP_THREE
314.  
315.             #include "standard_shadow_clipped.cginc"
316.  
317.             ENDCG
318.         }
319.  
320.         // ------------------------------------------------------------------
321.         // Extracts information for lightmapping, GI (emission, albedo, ...)
322.         // This pass it not used during regular rendering.
323.         Pass
324.         {
325.             Name "META"
326.             Tags { "LightMode"="Meta" }
327.  
328.             Cull Off
329.  
330.             CGPROGRAM
331.             #pragma vertex vert_meta
332.             #pragma fragment frag_meta
333.  
334.             #pragma shader_feature _EMISSION
335.             #pragma shader_feature _METALLICGLOSSMAP
336.             #pragma shader_feature ___ _DETAIL_MULX2
337.  
338.             #include "UnityStandardMeta.cginc"
339.             ENDCG
340.         }
341.     }
342.  
343.     FallBack "VertexLit"
344.     CustomEditor "StandardShaderGUI"
345. }

I'm at a loss.
Thoughts?

 

That's built off of the standard shader, and still using the standard shader editor, so just enable Fade or Transparency on the material in the inspector. There shouldn't be any code changes needed at all.