diff --git a/MatterControlLib/DesignTools/SupportGenerator.cs b/MatterControlLib/DesignTools/SupportGenerator.cs
index 2def7afaa..df025d9c5 100644
--- a/MatterControlLib/DesignTools/SupportGenerator.cs
+++ b/MatterControlLib/DesignTools/SupportGenerator.cs
@@ -131,7 +131,7 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 		}
 
-		public static ITraceable CreateTraceData(FaceList faceList, List<Vector3Float> vertexList, BvhCreationOptions bvhCreationOptions = BvhCreationOptions.LegacySlowConstructionFastTracing)
+		public static ITraceable CreateTraceData(FaceList faceList, List<Vector3Float> vertexList, BvhCreationOptions bvhCreationOptions = BvhCreationOptions.BottomUpClustering)
 		{
 			var allPolys = new List<ITraceable>();
 
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index 32f66080e..7db8dbacd 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit 32f66080ec934759c1dd7050e620652dfda347e7
+Subproject commit 7db8dbacdf8d4db1e1eb8afc0ec2598f5c8088c8