Skybox covering transparent shader pass, but not in "scene" view

Unity Engine
1

The shader works like I want it to in the “scene” view tab:

… but the skybox covers the transparent area in the game and “game” view tab:

I’m new-ish to shaders, so I’m probably missing something simple but I can’t figure it out.

Here’s the shader I’m using:

Shader ".Note" {
	Properties {
		_Color ("Main Color", Color) = (1,1,1,1)
	}
	SubShader {		
		Pass {
			Tags { "Queue"="Geometry" }
			LOD 200

			CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"

				float4 _Color;

				struct v2f {
					float4 pos : POSITION;
				};

				v2f vert(appdata_base v) {
					v2f o;
					o.pos = v.vertex;

					if (o.pos.z < 0)
						o.pos.z += 0.25;

					float fpz = 0.5;
					if (-1 < o.pos.z  o.pos.z < 1)
						fpz = frac(abs(o.pos.z)) / 2.0;

					if (v.normal.y < 0)
						o.pos.y += fpz;
					else
						o.pos.y -= fpz;

					if (v.normal.z < 0)
						o.pos.z = -0.25;
					else
						o.pos.z = 0;

					o.pos = mul(UNITY_MATRIX_MVP, o.pos);
					return o;
				}

				half4 frag(v2f i) : COLOR {
					return _Color;
				}
			ENDCG
		}
		Pass {
			Tags { "Queue"="Transparent" }

			Blend SrcAlpha OneMinusSrcAlpha
			LOD 200
			ZWrite Off

			CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"

				float4 _Color;

				struct v2f {
					float4 pos : POSITION;
				};

				v2f vert(appdata_base v) {
					v2f o;
					o.pos = v.vertex;
					o.pos = mul(UNITY_MATRIX_MVP, o.pos);
					return o;
				}

				half4 frag(v2f i) : COLOR {
					half4 o;
					o.xyz = _Color.rgb;
					o.a = _Color.a;
					return o;
				}
			ENDCG
		}
	}

	Fallback "VertexLit"
}

I’ve tried various other tags and flags, and setting the camera to use a solid color works correctly in both the game and scene views, but the shader doesn’t work when the skybox is turned on. Does anybody know what I’m doing wrong?

Cheers,
~ andy.f

2

Queue is not a Pass Tag; it’s a Subshader Tag. I don’t know Cg, so can’t help you a lot, but you do need to get that fixed, and it could end up being helpful. You can’t put multiple passes in multiple queues. You need two different materials for that.

http://unity3d.com/support/documentation/Components/SL-SubshaderTags.html

3

That makes sense. I’m not sure why it works in the scene view but not in game, but w/e.

Cheers,
~ af

4

No, if it seemed like it, it was a case of random drawing order working out in favor of what you wanted. You can see in the Inspector for a shader that you click in in the Project pane; a shader can only be in one queue, which is conveniently listed there. Unity 2.5 introduced that.

5

Take a look at the glass shader example at http://unity3d.com/support/documentation/Components/SL-Blend.html. Perhaps the first queue tag found in a pass is used if it’s not in the subshader tags? …or maybe it’s old documentation? Either way, it’s easy to get confused regarding what’s do-able or not in shader passes.

Cheers,
~ andy.f

6

I was able to get the shader working in game by adding a surface shader after the last vert/frag pass …

Shader ".Note" {
	Properties {
		_Color ("Main Color", Color) = (1, 1, 1, 1)
		_SpecularColor ("Specular Color", Color) = (1, 1, 1, 1)
		_Shininess ("Shininess", Range (0.01, 1)) = 0.01
	}
	SubShader {		
		Pass {
			Tags { "Queue"="Geometry" }
			LOD 200

			CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"

				float4 _Color;

				struct v2f {
					float4 pos : POSITION;
				};

				v2f vert(appdata_base v) {
					v2f o;
					o.pos = v.vertex;

					if (o.pos.z < 0)
						o.pos.z += 0.25;

					float fpz = 0.5;
					if (-1 < o.pos.z  o.pos.z < 1)
						fpz = frac(abs(o.pos.z)) / 2.0;

					if (v.normal.y < 0)
						o.pos.y += fpz;
					else
						o.pos.y -= fpz;

					if (v.normal.z < 0)
						o.pos.z = -0.25;
					else
						o.pos.z = 0;

					o.pos = mul(UNITY_MATRIX_MVP, o.pos);
					return o;
				}

				half4 frag(v2f i) : COLOR {
					return _Color;
				}
			ENDCG
		}

		Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
		LOD 300

		CGPROGRAM
			#pragma surface surf BlinnPhong alpha

			float4 _SpecularColor;
			float _Shininess;

			struct Input {
				float4 color;
			};

			void surf (Input IN, inout SurfaceOutput o) {
				o.Albedo = _SpecularColor.rgb;
				o.Gloss = _SpecularColor.a;
				o.Alpha = _SpecularColor.a;
				o.Specular = _Shininess;
			}
		ENDCG
	}

	Fallback "VertexLit"
}

Cheers,
~ andy.f

7

No idea why they did that. It doesn’t work; I’ll report a bug later.