update

Assets/RawAssets/Lit Opague.mat

@@ -9,11 +9,11 @@ Material:
   m_PrefabAsset: {fileID: 0}
   m_Name: Lit Opague
   m_Shader: {fileID: 4800000, guid: 6848ac66b88696c4ea2f1389e0877b8e, type: 3}
-  m_ShaderKeywords: _PREMULTIPLY_ALPHA
+  m_ShaderKeywords: 
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
-  m_CustomRenderQueue: -1
+  m_CustomRenderQueue: 2000
   stringTagMap: {}
   disabledShaderPasses: []
   m_SavedProperties:
@@ -73,7 +73,7 @@ Material:
     - _Mode: 0
     - _OcclusionStrength: 1
     - _Parallax: 0.02
-    - _PremulAlpha: 1
+    - _PremulAlpha: 0
     - _Smoothness: 0.68
     - _SmoothnessTextureChannel: 0
     - _SpecularHighlights: 1

Assets/RawAssets/Unlit Red Opaque.mat

@@ -13,7 +13,7 @@ Material:
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
-  m_CustomRenderQueue: -1
+  m_CustomRenderQueue: 3000
   stringTagMap: {}
   disabledShaderPasses: []
   m_SavedProperties:
@@ -28,9 +28,9 @@ Material:
     - _Clipping: 0
     - _Cull: 2
     - _Cutoff: 0.5
-    - _DstBlend: 0
-    - _SrcBlend: 1
-    - _ZWrite: 1
+    - _DstBlend: 10
+    - _SrcBlend: 5
+    - _ZWrite: 0
     m_Colors:
     - _BaseColor: {r: 0.8207547, g: 0.18970275, b: 0.18970275, a: 1}
     - _Color: {r: 1, g: 1, b: 1, a: 1}

Assets/Scenes/SampleScene.unity

@@ -7171,7 +7171,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!4 &1603649012
 Transform:
   m_ObjectHideFlags: 0

Assets/Scripts/Editor/CustomShaderGUI.cs

@@ -7,6 +7,7 @@ public class CustomShaderGUI : ShaderGUI
     MaterialEditor editor;
     Object[] materials;
     MaterialProperty[] properties;
+    bool showPresents;
 
     public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] properties)
     {
@@ -14,18 +15,35 @@ public class CustomShaderGUI : ShaderGUI
         editor = materialEditor;
         materials = materialEditor.targets;
         this.properties = properties;
-		OpaquePreset();
+
+        EditorGUILayout.Space();
+        showPresents = EditorGUILayout.Foldout(showPresents, "Presents", true);
+        if (showPresents)
+        {
+            OpaquePreset();
+            ClipPreset();
+            FadePreset();
+            TransparentPreset();
+        }
     }
 
     void SetProperty(string name, string keyword, bool value)
     {
-        SetProperty(name, value ? 1f : 0f);
-        SetKeyword(keyword, value);
+        if (SetProperty(name, value ? 1f : 0f))
+        {
+            SetKeyword(keyword, value);
+        }
     }
 
-    void SetProperty(string name, float value)
+    bool SetProperty(string name, float value)
     {
-        FindProperty(name, properties).floatValue = value;
+        MaterialProperty property = FindProperty(name, properties, false);
+        if (property != null)
+        {
+            property.floatValue = value;
+            return true;
+        }
+        return false;
     }
 
     void SetKeyword(string keyword, bool enabled)
@@ -82,6 +100,9 @@ public class CustomShaderGUI : ShaderGUI
         }
     }
 
+    bool HasProperty(string name) => FindProperty(name, properties, false) != null;
+    bool HasPremultiplyAlpha => HasProperty("_PremulAlpha");
+
     bool PresetButton(string name)
     {
         if (GUILayout.Button(name)) {
@@ -103,4 +124,43 @@ public class CustomShaderGUI : ShaderGUI
             RenderQueue = RenderQueue.Geometry;
         }
     }
+
+    void ClipPreset()
+    {
+        if (PresetButton("Clip"))
+        {
+            Clipping = true;
+            PremultiplyAlpha = false;
+            SrcBlend = BlendMode.One;
+            DstBlend = BlendMode.Zero;
+            ZWrite = true;
+            RenderQueue = RenderQueue.AlphaTest;
+        }
+    }
+
+    void FadePreset()
+    {
+        if (PresetButton("Fade"))
+        {
+            Clipping = false;
+            PremultiplyAlpha = false;
+            SrcBlend = BlendMode.SrcAlpha;
+            DstBlend = BlendMode.OneMinusSrcAlpha;
+            ZWrite = false;
+            RenderQueue = RenderQueue.Transparent;
+        }
+    }
+
+    void TransparentPreset()
+    {
+        if (HasPremultiplyAlpha && PresetButton("Transparent"))
+        {
+            Clipping = false;
+            PremultiplyAlpha = true;
+            SrcBlend = BlendMode.One;
+            DstBlend = BlendMode.OneMinusSrcAlpha;
+            ZWrite = false;
+            RenderQueue = RenderQueue.Transparent;
+        }
+    }
 }