diff --git a/Terminal.Gui/Drawing/Quant/ColorQuantizer.cs b/Terminal.Gui/Drawing/Quant/ColorQuantizer.cs
index d6aa95d74..ac51399e2 100644
--- a/Terminal.Gui/Drawing/Quant/ColorQuantizer.cs
+++ b/Terminal.Gui/Drawing/Quant/ColorQuantizer.cs
@@ -28,7 +28,7 @@ public class ColorQuantizer
     /// <summary>
     /// Gets or sets the algorithm used to build the <see cref="Palette"/>.
     /// </summary>
-    public IPaletteBuilder PaletteBuildingAlgorithm { get; set; } = new PopularityPaletteWithThreshold (new EuclideanColorDistance (),5) ;
+    public IPaletteBuilder PaletteBuildingAlgorithm { get; set; } = new PopularityPaletteWithThreshold (new EuclideanColorDistance (),8) ;
 
     private readonly ConcurrentDictionary<Color, int> _nearestColorCache = new ();
 
@@ -46,6 +46,7 @@ public class ColorQuantizer
             }
         }
 
+        _nearestColorCache.Clear ();
         Palette = PaletteBuildingAlgorithm.BuildPalette (allColors, MaxColors);
     }
 
diff --git a/UICatalog/Scenarios/Images.cs b/UICatalog/Scenarios/Images.cs
index 818e1db0b..4df644b3a 100644
--- a/UICatalog/Scenarios/Images.cs
+++ b/UICatalog/Scenarios/Images.cs
@@ -53,10 +53,10 @@ public class Images : Scenario
     private View _sixelView;
 
     private DoomFire _fire;
-    private SixelEncoder _encoder;
+    private SixelEncoder _fireEncoder;
+    private SixelToRender _fireSixel;
     private int _fireFrameCounter;
     private bool _isDisposed;
-    private SixelToRender _fireSixel;
 
     public override void Main ()
     {
@@ -155,19 +155,14 @@ public class Images : Scenario
         }
 
         _fire = new DoomFire (_win.Frame.Width * _pxX.Value, _win.Frame.Height * _pxY.Value);
-        _encoder = new SixelEncoder ();
-        _encoder.Quantizer.PaletteBuildingAlgorithm = new ConstPalette (_fire.Palette);
+        _fireEncoder = new SixelEncoder ();
+        _fireEncoder.Quantizer.PaletteBuildingAlgorithm = new ConstPalette (_fire.Palette);
 
         _fireFrameCounter = 0;
 
         Application.AddTimeout (TimeSpan.FromMilliseconds (30), AdvanceFireTimerCallback);
     }
 
-    private void StopFire ()
-    {
-
-    }
-
     private bool AdvanceFireTimerCallback ()
     {
         _fire.AdvanceFrame ();
@@ -190,7 +185,7 @@ public class Images : Scenario
 
         _fireSixel = new ()
         {
-            SixelData = _encoder.EncodeSixel (bmp),
+            SixelData = _fireEncoder.EncodeSixel (bmp),
             ScreenPosition = new (0, 0)
         };
 
@@ -410,6 +405,7 @@ public class Images : Scenario
     )
     {
         var encoder = new SixelEncoder ();
+        
 
         // Calculate the target size in pixels based on console units
         int targetWidthInPixels = maxSize.Width * pixelsPerCellX;