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Assets/02_Scripts/_Util/Editor/IntRangeDrawer.cs

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+using UnityEditor;
+using UnityEngine;
+
+// IntRange를 "라벨 [Min] ~ [Max]" 한 줄로 그린다.
+[CustomPropertyDrawer(typeof(IntRange))]
+public class IntRangeDrawer : PropertyDrawer
+{
+    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        => EditorGUIUtility.singleLineHeight;
+
+    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+    {
+        EditorGUI.BeginProperty(position, label, property);
+        position = EditorGUI.PrefixLabel(position, label);
+
+        int indent = EditorGUI.indentLevel;
+        EditorGUI.indentLevel = 0;   // PrefixLabel 뒤 필드가 들여쓰기에 밀리지 않게
+
+        const float tildeWidth = 14f;
+        float fieldWidth = (position.width - tildeWidth) * 0.5f;
+        var minRect = new Rect(position.x, position.y, fieldWidth, position.height);
+        var tildeRect = new Rect(minRect.xMax, position.y, tildeWidth, position.height);
+        var maxRect = new Rect(tildeRect.xMax, position.y, fieldWidth, position.height);
+
+        EditorGUI.PropertyField(minRect, property.FindPropertyRelative("Min"), GUIContent.none);
+        EditorGUI.LabelField(tildeRect, "~", CenteredLabel);
+        EditorGUI.PropertyField(maxRect, property.FindPropertyRelative("Max"), GUIContent.none);
+
+        EditorGUI.indentLevel = indent;
+        EditorGUI.EndProperty();
+    }
+
+    static GUIStyle _centered;
+    static GUIStyle CenteredLabel => _centered ??= new GUIStyle(EditorStyles.label) { alignment = TextAnchor.MiddleCenter };
+}

Assets/02_Scripts/_Util/Editor/IntRangeDrawer.cs.meta

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+fileFormatVersion: 2
+guid: 878034b1fe8afe64eaeb9b2e9b329778