diff --git a/MatterControlLib/DesignTools/LithophaneObject3D.cs b/MatterControlLib/DesignTools/LithophaneObject3D.cs
index e816fbf53..9c333f710 100644
--- a/MatterControlLib/DesignTools/LithophaneObject3D.cs
+++ b/MatterControlLib/DesignTools/LithophaneObject3D.cs
@@ -31,6 +31,7 @@ using System.ComponentModel;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Threading.Tasks;
+using MatterHackers.Agg;
 using MatterHackers.Agg.Platform;
 using MatterHackers.Agg.UI;
 using MatterHackers.DataConverters3D;
@@ -92,6 +93,21 @@ namespace MatterHackers.MatterControl.Plugins.Lithophane
 			this.DebugDepth("Rebuild");
 			var activeImage = this.ImageChild.Image;
 
+			if (activeImage == null
+				|| activeImage.Width == 0
+				|| activeImage.Height == 0)
+			{
+				return Task.CompletedTask;
+			}
+
+			activeImage.GetVisibleBounds(out RectangleInt visibleBounds);
+
+			if (visibleBounds.Width == 0
+				|| visibleBounds.Height == 0)
+			{
+				return Task.CompletedTask;
+			}
+
 			ApplicationController.Instance.Tasks.Execute("Generating Lithophane".Localize(), null, (reporter, cancellationToken) =>
 			{
 				var generatedMesh = Lithophane.Generate(
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index 4f8dfe49e..859bcc06d 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit 4f8dfe49e47e0cdf1e3d954edaa189f87b4adc49
+Subproject commit 859bcc06d3dd9afb98f6a395ca730230321bc985