(Feat) Add build cost

Assets/GAME/Script/Editor/ScreenshotStudio/ScreenshotStudioWindow.cs

@@ -23,6 +23,12 @@ namespace Ashwild.EditorTools
         /// </summary>
         private enum LightingPreset { Studio, Soft, Dramatic, Flat }
 
+        /// <summary>
+        /// Which asset kind the Target object picker is filtered to — prefabs/scene objects or raw
+        /// meshes. Materials, scripts and other assets are intentionally excluded from both.
+        /// </summary>
+        private enum TargetKind { Prefab, Mesh }
+
         #endregion
 
         #region Constants
@@ -46,6 +52,8 @@ namespace Ashwild.EditorTools
         private string exportFileName = string.Empty;
         private bool nameEditedByUser;
 
+        private TargetKind targetKind = TargetKind.Prefab;
+
         private bool autoRotate;
         private IVisualElementScheduledItem rotateSchedule;
 
@@ -172,15 +180,30 @@ namespace Ashwild.EditorTools
         }
 
         /// <summary>
-        /// Target card: the object field (prefab / scene object / mesh) plus quick Frame and auto-rotate
-        /// controls that act on the loaded subject.
+        /// Target card: a Prefab/Mesh kind selector that filters the object picker to only those assets
+        /// (so materials, scripts and the like never clutter it), the object field itself, plus quick
+        /// Frame and auto-rotate controls that act on the loaded subject.
         /// </summary>
         private VisualElement BuildTargetCard()
         {
             VisualElement card = Card("Target");
 
-            ObjectField field = new ObjectField("Object") { objectType = typeof(UnityEngine.Object), allowSceneObjects = true };
+            ObjectField field = new ObjectField("Object")
+            {
+                objectType = TargetObjectType(),
+                allowSceneObjects = targetKind == TargetKind.Prefab
+            };
             field.RegisterValueChangedCallback(evt => LoadTarget(evt.newValue));
+
+            EnumField kind = new EnumField("Kind", targetKind);
+            kind.RegisterValueChangedCallback(evt =>
+            {
+                targetKind = (TargetKind)evt.newValue;
+                field.value = null;
+                field.objectType = TargetObjectType();
+                field.allowSceneObjects = targetKind == TargetKind.Prefab;
+            });
+            card.Add(kind);
             card.Add(field);
 
             VisualElement buttons = new VisualElement();
@@ -198,6 +221,12 @@ namespace Ashwild.EditorTools
             return card;
         }
 
+        /// <summary>
+        /// The Unity type the object picker is restricted to for the current kind — GameObject for
+        /// prefabs/scene objects, Mesh for raw meshes — so nothing else appears in the picker.
+        /// </summary>
+        private Type TargetObjectType() => targetKind == TargetKind.Mesh ? typeof(Mesh) : typeof(GameObject);
+
         /// <summary>
         /// Camera card: projection, field of view and framing padding.
         /// </summary>