diff --git a/Runtime/Rendering/TextureAttributes/SetTextureAttributeChannel.cs b/Runtime/Rendering/TextureAttributes/SetTextureAttributeChannel.cs
index 3b3241a..ba10d0a 100644
--- a/Runtime/Rendering/TextureAttributes/SetTextureAttributeChannel.cs
+++ b/Runtime/Rendering/TextureAttributes/SetTextureAttributeChannel.cs
@@ -21,6 +21,9 @@ namespace Rokojori
     [Export]
     public TextureAttributes.Channel channel = TextureAttributes.Channel.Red;
 
+    [Export]
+    public TextureAttributes.OperatorType operatorType = TextureAttributes.OperatorType.Set;
+
     protected override void _OnTrigger()
     {
       var ta = textureAttributes;
@@ -37,7 +40,7 @@ namespace Rokojori
       }
 
       this.LogInfo( "Index", index, "Value:", value, "Channel:", channel );
-      ta.SetChannel( index, value, channel );
+      ta.SetChannel( index, value, channel, operatorType );
     }
   }
 }
\ No newline at end of file
diff --git a/Runtime/Rendering/TextureAttributes/TextureAttributes.cs b/Runtime/Rendering/TextureAttributes/TextureAttributes.cs
index f7aa0fb..3693062 100644
--- a/Runtime/Rendering/TextureAttributes/TextureAttributes.cs
+++ b/Runtime/Rendering/TextureAttributes/TextureAttributes.cs
@@ -26,6 +26,11 @@ namespace Rokojori
       Red, Green, Blue, Alpha
     }
 
+    public enum OperatorType
+    {
+      Set, Add, Subtract, Multiply
+    }
+
     [Export]
     public Size sizeType =Size._64;
 
@@ -132,7 +137,33 @@ namespace Rokojori
       );
     }
 
-    public void SetChannel( int index, float value, Channel channel )
+    float ApplyOperator( float leftValue, float rightValue, OperatorType operatorType )
+    {
+      if ( OperatorType.Set == operatorType )
+      {
+        return rightValue;
+      }
+
+      if ( OperatorType.Add == operatorType )
+      {
+        return leftValue + rightValue;
+      }
+
+      if ( OperatorType.Subtract == operatorType )
+      {
+        return leftValue - rightValue;
+      }
+
+      if ( OperatorType.Multiply == operatorType )
+      {
+        return leftValue * rightValue;
+      }
+
+      return leftValue;
+
+    }
+
+    public void SetChannel( int index, float value, Channel channel, OperatorType operatorType = OperatorType.Set )
     {
       Update(
         ( Image i ) =>
@@ -142,19 +173,19 @@ namespace Rokojori
 
           if ( channel == Channel.Red )
           {
-            currentValue.R = value;
+            currentValue.R = ApplyOperator( currentValue.R, value, operatorType );
           }
           else if ( channel == Channel.Green )
           {
-            currentValue.G = value;
+            currentValue.G = ApplyOperator( currentValue.G, value, operatorType );
           }
           else if ( channel == Channel.Blue )
           {
-            currentValue.B = value;
+            currentValue.B = ApplyOperator( currentValue.B, value, operatorType );
           }
           else if ( channel == Channel.Alpha )
           {
-            currentValue.A = value;
+            currentValue.A = ApplyOperator( currentValue.A, value, operatorType );
           }
 
           i.SetPixelv( uv, currentValue );
diff --git a/Runtime/Structures/Spatial/Voronoi/Voronoi2D.cs b/Runtime/Structures/Spatial/Voronoi/Voronoi2D.cs
index 4fc7575..2cc1eb3 100644
--- a/Runtime/Structures/Spatial/Voronoi/Voronoi2D.cs
+++ b/Runtime/Structures/Spatial/Voronoi/Voronoi2D.cs
@@ -43,6 +43,9 @@ namespace Rokojori
       {
         return boundaries.Map( b => _voronoi2D.boundaryPoints[ b ] );        
       }
+
+      public Vector2 center => _voronoi2D.cellPoints[ index ];
+
     }