diff --git a/MatterControl.Printing/Settings/SettingsKey.cs b/MatterControl.Printing/Settings/SettingsKey.cs
index ccfabb29f..941be5e84 100644
--- a/MatterControl.Printing/Settings/SettingsKey.cs
+++ b/MatterControl.Printing/Settings/SettingsKey.cs
@@ -166,6 +166,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 		public const string min_print_speed = nameof(min_print_speed);
 		public const string min_skirt_length = nameof(min_skirt_length);
 		public const string model = nameof(model);
+		public const string montonic_solid_infill = nameof(montonic_solid_infill);
 		public const string nozzle_diameter = nameof(nozzle_diameter);
 		public const string number_of_first_layers = nameof(number_of_first_layers);
 		public const string oem_profile_token = nameof(oem_profile_token);
diff --git a/MatterControl.Printing/Settings/SliceSettingsFields.cs b/MatterControl.Printing/Settings/SliceSettingsFields.cs
index 4227ad6f4..d2d0ff3c4 100644
--- a/MatterControl.Printing/Settings/SliceSettingsFields.cs
+++ b/MatterControl.Printing/Settings/SliceSettingsFields.cs
@@ -76,6 +76,17 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 					Converter = new MappedToBoolString(),
 				},
 				new SliceSettingData()
+				{
+					SlicerConfigName = SettingsKey.montonic_solid_infill,
+					PresentationName = "Monotonic Solid Infill".Localize().Localize(),
+					HelpText = "When filling bottom and top solid layers always create them so that each new print segment side is touching a previous segment on the same side.".Localize(),
+					DataEditType = DataEditTypes.CHECK_BOX,
+					DefaultValue = "1",
+					RequiredDisplayDetail = DisplayDetailRequired.Advanced,
+					UiUpdate = UiUpdateRequired.SliceSettings,
+					Converter = new MappedToBoolString(),
+				},
+				new SliceSettingData()
 				{
 					SlicerConfigName = SettingsKey.sla_mirror_mode,
 					PresentationName = "Mirror Mode".Localize(),
@@ -601,7 +612,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 					PresentationName = "Seam Placement".Localize(),
 					HelpText = "What to do when there is not a good place to hide the seam.".Localize(),
 					DataEditType = DataEditTypes.LIST,
-					ListValues = "Furthest Back,Centered In Back,Randomized,Fastest",
+					ListValues = "Furthest Back,Centered In Back,Always Centered In Back,Randomized,Fastest",
 					DefaultValue = "Furthest Back",
 				},
 				new SliceSettingData()
diff --git a/MatterControl.Printing/Settings/SliceSettingsLayouts.cs b/MatterControl.Printing/Settings/SliceSettingsLayouts.cs
index 31e4e28c2..9cb169e0d 100644
--- a/MatterControl.Printing/Settings/SliceSettingsLayouts.cs
+++ b/MatterControl.Printing/Settings/SliceSettingsLayouts.cs
@@ -76,7 +76,8 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 						SettingsKey.merge_overlapping_lines,
 						SettingsKey.seam_placement,
 						SettingsKey.expand_thin_walls,
-						SettingsKey.coast_at_end_distance
+						SettingsKey.coast_at_end_distance,
+						SettingsKey.montonic_solid_infill,
 					}),
 					("Infill", new[]
 					{
diff --git a/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs b/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs
index f6f7aa0fb..5c7c29e4e 100644
--- a/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs
+++ b/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs
@@ -143,6 +143,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 				[SettingsKey.nozzle_diameter] = new ExportField("extrusionWidth"),
 				[SettingsKey.extruder_count] = new ExportField("extruderCount"),
 				[SettingsKey.avoid_crossing_perimeters] = new ExportField("avoidCrossingPerimeters"),
+				[SettingsKey.montonic_solid_infill] = new ExportField("monotonicSolidInfill"),
 				[SettingsKey.create_raft] = new ExportField("enableRaft"),
 				[SettingsKey.external_perimeters_first] = new ExportField("outsidePerimetersFirst"),
 				[SettingsKey.output_only_first_layer] = new ExportField("outputOnlyFirstLayer"),
diff --git a/MatterControlLib/Utilities/WebUtilities/WebCache.cs b/MatterControlLib/Utilities/WebUtilities/WebCache.cs
index a8c321ded..f8a040f1f 100644
--- a/MatterControlLib/Utilities/WebUtilities/WebCache.cs
+++ b/MatterControlLib/Utilities/WebUtilities/WebCache.cs
@@ -382,12 +382,10 @@ namespace MatterHackers.MatterControl
 				double finalScale = imageToLoadInto.Width / (double)unScaledImage.Width;
 				imageToLoadInto.Allocate(imageToLoadInto.Width, (int)(unScaledImage.Height * finalScale), imageToLoadInto.Width * (imageToLoadInto.BitDepth / 8), imageToLoadInto.BitDepth);
 				imageToLoadInto.NewGraphics2D().Render(unScaledImage, 0, 0, 0, finalScale, finalScale);
-				imageToLoadInto.MarkImageChanged();
 			}
 			else
 			{
 				StaticData.Instance.LoadImageData(stream, imageToLoadInto);
-				imageToLoadInto.MarkImageChanged();
 			}
 		}
 	}
diff --git a/Submodules/MatterSlice b/Submodules/MatterSlice
index 24899b9ed..a7ba094ee 160000
--- a/Submodules/MatterSlice
+++ b/Submodules/MatterSlice
@@ -1 +1 @@
-Subproject commit 24899b9ed5ce615865f6eff7f8abd3b762a59440
+Subproject commit a7ba094ee46ddcb0ecc1963320af01bb745a6808
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index bee2b8277..ff9de4009 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit bee2b82773e97a827f8ef22d5b0427864c8222e2
+Subproject commit ff9de4009f162a0d516a4964b5514f0023388225