Added GenerateMask to AssetsHelpers;

Editor/AssetsHelpers/Implementation/Material/CreateTerrainLayer/CreateTerrainLayerMenu.cs

@@ -0,0 +1,34 @@
+using UnityEditor;
+using UnityEngine;
+
+namespace Misaki.ArtToolEditor
+{
+    public class CreateTerrainLayerMenu
+    {
+        private const string Terrain_Layer_Extension = ".terrainlayer";
+
+        [MenuItem("Assets/Art Tools/Material Helpers/Create Terrain Layer", true)]
+        public static bool CreateTerrainLayerValidator()
+        {
+            foreach (var selectedObject in Selection.objects)
+            {
+                if (selectedObject is not Material)
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        [MenuItem("Assets/Art Tools/Material Helpers/Create Terrain Layer")]
+        public static void CreateTerrainLayer()
+        {
+            var window = EditorWindow.GetWindow<OutputOptionsWindow>(true, "Extract Materials Output Options");
+            window.WithItemSource(Selection.objects);
+            window.RegisterProcessor<CreateTerrainLayerProcessor>();
+
+            window.InitializeAndShow();
+        }
+    }
+}

Editor/AssetsHelpers/Implementation/Material/CreateTerrainLayer/CreateTerrainLayerMenu.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 4ba5b5a3211673749a18dae69e07a0f3

Editor/AssetsHelpers/Implementation/Material/CreateTerrainLayer/CreateTerrainLayerProcessor.cs

@@ -0,0 +1,37 @@
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+
+namespace Misaki.ArtToolEditor
+{
+    internal class CreateTerrainLayerProcessor : IAssetsProcessor
+    {
+        private const string Terrain_Layer_Extension = ".terrainlayer";
+
+        public void OnPreProcess(AssetsProcessContext context)
+        {
+        }
+
+        public void OnProcess(UnityEngine.Object source, string outputDirectory, AssetsProcessContext context)
+        {
+            if (source is not Material mat)
+            {
+                return;
+            }
+
+            var terrainLayer = new TerrainLayer()
+            {
+                diffuseTexture = mat.GetTexture("_BaseColorMap") as Texture2D,
+                normalMapTexture = mat.GetTexture("_NormalMap") as Texture2D,
+                maskMapTexture = mat.GetTexture("_MaskMap") as Texture2D,
+            };
+
+            var outputPath = Path.Combine(outputDirectory, mat.name + Terrain_Layer_Extension);
+            AssetDatabase.CreateAsset(terrainLayer, outputPath);
+        }
+
+        public void OnPostProcess(AssetsProcessContext context)
+        {
+        }
+    }
+}

Editor/AssetsHelpers/Implementation/Material/CreateTerrainLayer/CreateTerrainLayerProcessor.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: c0d5979c585023248ba3c56e7936097f