diff --git a/Documents/todo.txt b/Documents/todo.txt
index c329db0a..5e1ccbc5 100644
--- a/Documents/todo.txt
+++ b/Documents/todo.txt
@@ -2,6 +2,8 @@
 
 - Make sector gradient features
 
+- Categories for control keys!
+
 - Make error checking feature
 
 - Make quick sector draw (square/circle) mode
diff --git a/Resources/Icons/BrightnessGradient.png b/Resources/Icons/BrightnessGradient.png
new file mode 100644
index 00000000..f88afbef
Binary files /dev/null and b/Resources/Icons/BrightnessGradient.png differ
diff --git a/Source/BuilderModes/BuilderModes.csproj b/Source/BuilderModes/BuilderModes.csproj
index 9221126c..3a49cd3d 100644
--- a/Source/BuilderModes/BuilderModes.csproj
+++ b/Source/BuilderModes/BuilderModes.csproj
@@ -155,6 +155,9 @@
   <ItemGroup>
     <None Include="Resources\treeview.png" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\BrightnessGradient.png" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/Source/BuilderModes/ClassicModes/BrightnessMode.cs b/Source/BuilderModes/ClassicModes/BrightnessMode.cs
index 901c8089..b209682a 100644
--- a/Source/BuilderModes/ClassicModes/BrightnessMode.cs
+++ b/Source/BuilderModes/ClassicModes/BrightnessMode.cs
@@ -47,20 +47,38 @@ namespace CodeImp.DoomBuilder.BuilderModes
 	
 	public sealed class BrightnessMode : BaseClassicMode
 	{
+		#region ================== Enums
+
+		private enum ModifyMode : int
+		{
+			None,
+			Adjusting
+		}
+
+		#endregion
+
 		#region ================== Constants
 
 		#endregion
 
 		#region ================== Variables
-		
+
 		// Highlighted item
 		private Sector highlighted;
 		
 		// Interface
 		private bool editpressed;
-		
+
+		// The methods GetSelected* and MarkSelected* on the MapSet do not
+		// retain the order in which items were selected.
+		// This list keeps in order while sectors are selected/deselected.
+		protected List<Sector> orderedselection;
+
 		// Labels
 		private Dictionary<Sector, TextLabel[]> labels;
+
+		// Modifying
+		private ModifyMode mode;
 		
 		#endregion
 		
@@ -73,6 +91,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// Constructor
 		public BrightnessMode()
 		{
+			// Make ordered selection list
+			orderedselection = new List<Sector>();
 		}
 		
 		// Disposer
@@ -141,22 +161,39 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// This highlights a new item
 		protected void Highlight(Sector s)
 		{
-			// Update display
-			if(renderer.StartPlotter(false))
+			// Highlight actually changes?
+			if(s != highlighted)
 			{
-				// Undraw previous highlight
-				if((highlighted != null) && !highlighted.IsDisposed)
-					renderer.PlotSector(highlighted);
-				
-				// Set new highlight
-				highlighted = s;
-				
-				// Render highlighted item
-				if((highlighted != null) && !highlighted.IsDisposed)
-					renderer.PlotSector(highlighted, General.Colors.Highlight);
-				
-				// Done
-				renderer.Finish();
+				// Update display
+				if(renderer.StartPlotter(false))
+				{
+					if((highlighted != null) && !highlighted.IsDisposed)
+					{
+						// Undraw previous highlight
+						renderer.PlotSector(highlighted);
+
+						// Change label color
+						TextLabel[] labelarray = labels[highlighted];
+						foreach(TextLabel l in labelarray) l.Color = General.Colors.Selection;
+					}
+
+					// Set new highlight
+					highlighted = s;
+
+					if((highlighted != null) && !highlighted.IsDisposed)
+					{
+						// Render highlighted item
+						renderer.PlotSector(highlighted, General.Colors.Highlight);
+
+						// Change label color
+						TextLabel[] labelarray = labels[highlighted];
+						foreach(TextLabel l in labelarray) l.Color = General.Colors.Highlight;
+					}
+
+					renderer.Finish();
+				}
+
+				UpdateOverlay();
 				renderer.Present();
 			}
 			
@@ -166,6 +203,66 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			else
 				General.Interface.HideInfo();
 		}
+
+		// This selectes or deselects a sector
+		protected void SelectSector(Sector s, bool selectstate, bool update)
+		{
+			bool selectionchanged = false;
+
+			if(!s.IsDisposed)
+			{
+				// Select the sector?
+				if(selectstate && !s.Selected)
+				{
+					orderedselection.Add(s);
+					s.Selected = true;
+					selectionchanged = true;
+					
+					// Setup labels
+					TextLabel[] labelarray = labels[s];
+					foreach(TextLabel l in labelarray)
+					{
+						l.Text = orderedselection.Count.ToString();
+						l.Color = General.Colors.Selection;
+					}
+				}
+				// Deselect the sector?
+				else if(!selectstate && s.Selected)
+				{
+					orderedselection.Remove(s);
+					s.Selected = false;
+					selectionchanged = true;
+					
+					// Clear labels
+					TextLabel[] labelarray = labels[s];
+					foreach(TextLabel l in labelarray) l.Text = "";
+				}
+
+				// Selection changed?
+				if(selectionchanged)
+				{
+					// Make update lines selection
+					foreach(Sidedef sd in s.Sidedefs)
+					{
+						bool front, back;
+						if(sd.Line.Front != null) front = sd.Line.Front.Sector.Selected; else front = false;
+						if(sd.Line.Back != null) back = sd.Line.Back.Sector.Selected; else back = false;
+						sd.Line.Selected = front | back;
+					}
+				}
+
+				if(update)
+				{
+					UpdateOverlay();
+					renderer.Present();
+				}
+			}
+			else
+			{
+				// Remove from list
+				orderedselection.Remove(s);
+			}
+		}
 		
 		#endregion
 		
@@ -175,11 +272,10 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		public override void OnEngage()
 		{
 			base.OnEngage();
-			
-			// No selection
-			General.Map.Map.ClearAllMarks(false);
-			General.Map.Map.ClearAllSelected();
-			
+
+			// Add toolbar button
+			General.Interface.AddButton(BuilderPlug.Me.MenusForm.MakeGradientBrightness);
+
 			// Make custom presentation
 			CustomPresentation p = new CustomPresentation();
 			p.AddLayer(new PresentLayer(RendererLayer.Background, BlendingMode.Mask));
@@ -205,10 +301,62 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					labelarray[i].AlignY = TextAlignmentY.Middle;
 					labelarray[i].Scale = 14f;
 					labelarray[i].Color = General.Colors.Highlight;
-					labelarray[i].Backcolor = General.Colors.Background;
+					labelarray[i].Backcolor = General.Colors.Background.WithAlpha(80);
 				}
 				labels.Add(s, labelarray);
 			}
+
+			// Convert geometry selection to sectors only
+			General.Map.Map.ClearAllMarks(false);
+			General.Map.Map.MarkSelectedVertices(true, true);
+			ICollection<Linedef> lines = General.Map.Map.LinedefsFromMarkedVertices(false, true, false);
+			foreach(Linedef l in lines) l.Selected = true;
+			General.Map.Map.ClearMarkedSectors(true);
+			foreach(Linedef l in General.Map.Map.Linedefs)
+			{
+				if(!l.Selected)
+				{
+					if(l.Front != null) l.Front.Sector.Marked = false;
+					if(l.Back != null) l.Back.Sector.Marked = false;
+				}
+			}
+			General.Map.Map.ClearAllSelected();
+			foreach(Sector s in General.Map.Map.Sectors)
+			{
+				if(s.Marked)
+				{
+					s.Selected = true;
+					foreach(Sidedef sd in s.Sidedefs) sd.Line.Selected = true;
+				}
+			}
+			
+			// Fill the list with selected sectors (these are not in order, but we have no other choice)
+			ICollection<Sector> selectedsectors = General.Map.Map.GetSelectedSectors(true);
+			General.Map.Map.ClearSelectedSectors();
+			foreach(Sector s in selectedsectors) SelectSector(s, true, false);
+		}
+
+		// When disengaged
+		public override void OnDisengage()
+		{
+			base.OnDisengage();
+
+			// Remove toolbar button
+			General.Interface.RemoveButton(BuilderPlug.Me.MenusForm.MakeGradientBrightness);
+
+			// Going to EditSelectionMode?
+			if(General.Map.NewMode is EditSelectionMode)
+			{
+				// No selection made? But we have a highlight!
+				if((General.Map.Map.GetSelectedSectors(true).Count == 0) && (highlighted != null))
+				{
+					// Make the highlight the selection
+					SelectSector(highlighted, true, false);
+				}
+			}
+
+			// Hide highlight info
+			General.Interface.HideInfo();
 		}
 		
 		// This redraws the display
@@ -292,22 +440,140 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// Selecting with mouse
 		protected override void OnSelect()
 		{
-			base.OnSelect();
-			
-			// Sector highlighted?
+			// Item highlighted?
 			if((highlighted != null) && !highlighted.IsDisposed)
 			{
-				// Show index on label
-				for(int i = 0; i < highlighted.Triangles.IslandVertices.Count; i++)
+				// Flip selection
+				SelectSector(highlighted, !highlighted.Selected, true);
+
+				// Update display
+				if(renderer.StartPlotter(false))
 				{
-					labels[highlighted][i].Text = highlighted.Index.ToString();
+					// Redraw highlight to show selection
+					renderer.PlotSector(highlighted);
+					renderer.Finish();
+					renderer.Present();
 				}
-				
-				UpdateOverlay();
+			}
+			else
+			{
+				// Start making a selection
+				StartMultiSelection();
+			}
+
+			base.OnSelect();
+		}
+		
+		// End selection
+		protected override void OnEndSelect()
+		{
+			// Not stopping from multiselection?
+			if(!selecting)
+			{
+				// Item highlighted?
+				if((highlighted != null) && !highlighted.IsDisposed)
+				{
+					// Update display
+					if(renderer.StartPlotter(false))
+					{
+						// Render highlighted item
+						renderer.PlotSector(highlighted, General.Colors.Highlight);
+						renderer.Finish();
+					}
+
+					// Update overlay
+					TextLabel[] labelarray = labels[highlighted];
+					foreach(TextLabel l in labelarray) l.Color = General.Colors.Highlight;
+					UpdateOverlay();
+					renderer.Present();
+				}
+			}
+
+			base.OnEndSelect();
+		}
+
+		// This is called wheh selection ends
+		protected override void OnEndMultiSelection()
+		{
+			// Go for all lines
+			foreach(Linedef l in General.Map.Map.Linedefs)
+			{
+				l.Selected = ((l.Start.Position.x >= selectionrect.Left) &&
+							  (l.Start.Position.y >= selectionrect.Top) &&
+							  (l.Start.Position.x <= selectionrect.Right) &&
+							  (l.Start.Position.y <= selectionrect.Bottom) &&
+							  (l.End.Position.x >= selectionrect.Left) &&
+							  (l.End.Position.y >= selectionrect.Top) &&
+							  (l.End.Position.x <= selectionrect.Right) &&
+							  (l.End.Position.y <= selectionrect.Bottom));
+			}
+
+			// Go for all sectors
+			foreach(Sector s in General.Map.Map.Sectors)
+			{
+				// Go for all sidedefs
+				bool allselected = true;
+				foreach(Sidedef sd in s.Sidedefs)
+				{
+					if(!sd.Line.Selected)
+					{
+						allselected = false;
+						break;
+					}
+				}
+
+				// Sector completely selected?
+				SelectSector(s, allselected, false);
+			}
+
+			// Make sure all linedefs reflect selected sectors
+			foreach(Sector s in General.Map.Map.Sectors)
+				SelectSector(s, s.Selected, false);
+			
+			base.OnEndMultiSelection();
+			General.Interface.RedrawDisplay();
+		}
+
+		// This is called when the selection is updated
+		protected override void OnUpdateMultiSelection()
+		{
+			base.OnUpdateMultiSelection();
+
+			// Render selection
+			UpdateOverlay();
+			if(renderer.StartOverlay(false))
+			{
+				RenderMultiSelection();
+				renderer.Finish();
 				renderer.Present();
 			}
 		}
 		
 		#endregion
+		
+		#region ================== Actions
+
+		[BeginAction("gradientbrightness")]
+		public void MakeGradientBrightness()
+		{
+		}
+
+		// This clears the selection
+		[BeginAction("clearselection", BaseAction = true)]
+		public void ClearSelection()
+		{
+			// Clear selection
+			General.Map.Map.ClearAllSelected();
+			orderedselection.Clear();
+			
+			// Clear labels
+			foreach(TextLabel[] labelarray in labels.Values)
+				foreach(TextLabel l in labelarray) l.Text = "";
+			
+			// Redraw
+			General.Interface.RedrawDisplay();
+		}
+		
+		#endregion
 	}
 }
diff --git a/Source/BuilderModes/ClassicModes/SectorsMode.cs b/Source/BuilderModes/ClassicModes/SectorsMode.cs
index 8aa56e49..9072f3ab 100644
--- a/Source/BuilderModes/ClassicModes/SectorsMode.cs
+++ b/Source/BuilderModes/ClassicModes/SectorsMode.cs
@@ -77,10 +77,6 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		{
 			// Make ordered selection list
 			orderedselection = new List<Sector>();
-
-			// Fill the list with selected sectors (these are not in order, but we have no other choice)
-			ICollection<Sector> selectedsectors = General.Map.Map.GetSelectedSectors(true);
-			foreach(Sector s in selectedsectors) orderedselection.Add(s);
 		}
 
 		// Disposer
@@ -285,7 +281,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					s.Selected = true;
 					foreach(Sidedef sd in s.Sidedefs) sd.Line.Selected = true;
 				}
-			}		
+			}
+			
+			// Fill the list with selected sectors (these are not in order, but we have no other choice)
+			ICollection<Sector> selectedsectors = General.Map.Map.GetSelectedSectors(true);
+			foreach(Sector s in selectedsectors) orderedselection.Add(s);
 		}
 		
 		// Mode disengages
@@ -785,6 +785,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		{
 			// Clear selection
 			General.Map.Map.ClearAllSelected();
+			orderedselection.Clear();
 
 			// Redraw
 			General.Interface.RedrawDisplay();
diff --git a/Source/BuilderModes/Interface/MenusForm.Designer.cs b/Source/BuilderModes/Interface/MenusForm.Designer.cs
index 9574e657..b35033db 100644
--- a/Source/BuilderModes/Interface/MenusForm.Designer.cs
+++ b/Source/BuilderModes/Interface/MenusForm.Designer.cs
@@ -43,8 +43,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.thingsmenu = new System.Windows.Forms.ToolStripMenuItem();
 			this.rotatethingscwitem = new System.Windows.Forms.ToolStripMenuItem();
 			this.rotatethingsccwitem = new System.Windows.Forms.ToolStripMenuItem();
-			this.toolstrip = new System.Windows.Forms.ToolStrip();
+			this.globalstrip = new System.Windows.Forms.ToolStrip();
+			this.manualstrip = new System.Windows.Forms.ToolStrip();
+			this.buttonbrightnessgradient = new System.Windows.Forms.ToolStripButton();
 			this.menustrip.SuspendLayout();
+			this.manualstrip.SuspendLayout();
 			this.SuspendLayout();
 			// 
 			// menustrip
@@ -168,19 +171,41 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.rotatethingsccwitem.Size = new System.Drawing.Size(204, 22);
 			this.rotatethingsccwitem.Text = "Rotate Counterclockwise";
 			// 
-			// toolstrip
+			// globalstrip
 			// 
-			this.toolstrip.Location = new System.Drawing.Point(0, 24);
-			this.toolstrip.Name = "toolstrip";
-			this.toolstrip.Size = new System.Drawing.Size(423, 25);
-			this.toolstrip.TabIndex = 1;
-			this.toolstrip.Text = "toolstrip";
+			this.globalstrip.Location = new System.Drawing.Point(0, 24);
+			this.globalstrip.Name = "globalstrip";
+			this.globalstrip.Size = new System.Drawing.Size(423, 25);
+			this.globalstrip.TabIndex = 1;
+			this.globalstrip.Text = "toolstrip";
+			// 
+			// manualstrip
+			// 
+			this.manualstrip.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
+            this.buttonbrightnessgradient});
+			this.manualstrip.Location = new System.Drawing.Point(0, 49);
+			this.manualstrip.Name = "manualstrip";
+			this.manualstrip.Size = new System.Drawing.Size(423, 25);
+			this.manualstrip.TabIndex = 2;
+			this.manualstrip.Text = "toolStrip1";
+			// 
+			// buttonbrightnessgradient
+			// 
+			this.buttonbrightnessgradient.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image;
+			this.buttonbrightnessgradient.Image = global::CodeImp.DoomBuilder.BuilderModes.Properties.Resources.BrightnessGradient;
+			this.buttonbrightnessgradient.ImageScaling = System.Windows.Forms.ToolStripItemImageScaling.None;
+			this.buttonbrightnessgradient.ImageTransparentColor = System.Drawing.Color.Magenta;
+			this.buttonbrightnessgradient.Name = "buttonbrightnessgradient";
+			this.buttonbrightnessgradient.Size = new System.Drawing.Size(23, 22);
+			this.buttonbrightnessgradient.Tag = "gradientbrightness";
+			this.buttonbrightnessgradient.Text = "Make Brightness Gradient";
 			// 
 			// MenusForm
 			// 
 			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
 			this.ClientSize = new System.Drawing.Size(423, 248);
-			this.Controls.Add(this.toolstrip);
+			this.Controls.Add(this.manualstrip);
+			this.Controls.Add(this.globalstrip);
 			this.Controls.Add(this.menustrip);
 			this.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
 			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
@@ -193,6 +218,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.Text = "MenusForm";
 			this.menustrip.ResumeLayout(false);
 			this.menustrip.PerformLayout();
+			this.manualstrip.ResumeLayout(false);
+			this.manualstrip.PerformLayout();
 			this.ResumeLayout(false);
 			this.PerformLayout();
 
@@ -215,6 +242,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		private System.Windows.Forms.ToolStripMenuItem rotatethingsccwitem;
 		private System.Windows.Forms.ToolStripSeparator toolStripMenuItem3;
 		private System.Windows.Forms.ToolStripMenuItem splitlinedefsitem;
-		private System.Windows.Forms.ToolStrip toolstrip;
+		private System.Windows.Forms.ToolStrip globalstrip;
+		private System.Windows.Forms.ToolStrip manualstrip;
+		private System.Windows.Forms.ToolStripButton buttonbrightnessgradient;
 	}
 }
\ No newline at end of file
diff --git a/Source/BuilderModes/Interface/MenusForm.cs b/Source/BuilderModes/Interface/MenusForm.cs
index 9aeb91d6..eae4c152 100644
--- a/Source/BuilderModes/Interface/MenusForm.cs
+++ b/Source/BuilderModes/Interface/MenusForm.cs
@@ -53,6 +53,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		public ToolStripMenuItem LinedefsMenu { get { return linedefsmenu; } }
 		public ToolStripMenuItem SectorsMenu { get { return sectorsmenu; } }
 		public ToolStripMenuItem ThingsMenu { get { return thingsmenu; } }
+		public ToolStripButton MakeGradientBrightness { get { return buttonbrightnessgradient; } }
 
 		#endregion
 
@@ -69,8 +70,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			for(int i = 0; i < menustrip.Items.Count; i++) menus[i] = menustrip.Items[i];
 
 			// List all buttons
-			buttons = new ToolStripItem[toolstrip.Items.Count];
-			for(int i = 0; i < toolstrip.Items.Count; i++) buttons[i] = toolstrip.Items[i];
+			buttons = new ToolStripItem[globalstrip.Items.Count];
+			for(int i = 0; i < globalstrip.Items.Count; i++) buttons[i] = globalstrip.Items[i];
 		}
 		
 		#endregion
diff --git a/Source/BuilderModes/Interface/MenusForm.resx b/Source/BuilderModes/Interface/MenusForm.resx
index 777676a3..d0d5fc52 100644
--- a/Source/BuilderModes/Interface/MenusForm.resx
+++ b/Source/BuilderModes/Interface/MenusForm.resx
@@ -120,7 +120,10 @@
   <metadata name="menustrip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>17, 17</value>
   </metadata>
-  <metadata name="toolstrip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+  <metadata name="globalstrip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>118, 17</value>
   </metadata>
+  <metadata name="manualstrip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>210, 17</value>
+  </metadata>
 </root>
\ No newline at end of file
diff --git a/Source/BuilderModes/Properties/Resources.Designer.cs b/Source/BuilderModes/Properties/Resources.Designer.cs
index 99cdeccc..aa0723c3 100644
--- a/Source/BuilderModes/Properties/Resources.Designer.cs
+++ b/Source/BuilderModes/Properties/Resources.Designer.cs
@@ -60,6 +60,13 @@ namespace CodeImp.DoomBuilder.BuilderModes.Properties {
             }
         }
         
+        internal static System.Drawing.Bitmap BrightnessGradient {
+            get {
+                object obj = ResourceManager.GetObject("BrightnessGradient", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         internal static System.Drawing.Bitmap treeview {
             get {
                 object obj = ResourceManager.GetObject("treeview", resourceCulture);
diff --git a/Source/BuilderModes/Properties/Resources.resx b/Source/BuilderModes/Properties/Resources.resx
index 6789d3b4..c9087897 100644
--- a/Source/BuilderModes/Properties/Resources.resx
+++ b/Source/BuilderModes/Properties/Resources.resx
@@ -118,6 +118,9 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="BrightnessGradient" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\BrightnessGradient.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
   <data name="treeview" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\treeview.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
diff --git a/Source/BuilderModes/Resources/Actions.cfg b/Source/BuilderModes/Resources/Actions.cfg
index 53830dd1..b7095b1e 100644
--- a/Source/BuilderModes/Resources/Actions.cfg
+++ b/Source/BuilderModes/Resources/Actions.cfg
@@ -208,3 +208,12 @@ editselectionmode
 	allowmouse = true;
 	allowscroll = true;
 }
+
+gradientbrightness
+{
+	title = "Brightness: Make Gradient";
+	description = "Creates a brightness gradient over all selected sectors from the first to the last selected sector.";
+	allowkeys = true;
+	allowmouse = true;
+	allowscroll = true;
+}
diff --git a/Source/BuilderModes/Resources/BrightnessGradient.png b/Source/BuilderModes/Resources/BrightnessGradient.png
new file mode 100644
index 00000000..f88afbef
Binary files /dev/null and b/Source/BuilderModes/Resources/BrightnessGradient.png differ