Property Painter

1. Create new folder and name it Editor.

2. Inside Editor folder create new class, ExamplePainter.cs

   public class ExamplePainter
   {
   
   }
   

3. Inherit from PropertyPainter class.

   public class ExamplePainter : PropertyPainter
   {
   
   }
   

4. Implement virtual method OnPainterGUI.

   public class ExamplePainter : PropertyPainter
   {
       public override void OnPainterGUI(Rect originalPosition, Rect painterPosition, SerializedProperty property, GUIContent label)
       {
           // Painter GUI here...
       }
   }
   

5. Add PainterTarget attribute and set ExampleAttribute as target to this view.

   [PainterTarget(typeof(ExampleAttribute))]
   public class ExamplePainter : PropertyPainter
   {
       public override void OnPainterGUI(Rect originalPosition, Rect painterPosition, SerializedProperty property, GUIContent label)
       {
           // Property GUI here...
       }
   }