diff --git a/OpenRa.Game/MainWindow.cs b/OpenRa.Game/MainWindow.cs
index a39000bc4d..fd307f4aa7 100644
--- a/OpenRa.Game/MainWindow.cs
+++ b/OpenRa.Game/MainWindow.cs
@@ -51,9 +51,9 @@ namespace OpenRa.Game
 			TileMix = new Package("../../../" + map.Theater + ".mix");
 
 			renderer.SetPalette(new HardwarePalette(renderer.Device, map));
-			terrain = new TerrainRenderer(renderer, map, TileMix);
+			terrain = new TerrainRenderer(renderer, map, TileMix, viewport);
 
-			world = new World(renderer);
+			world = new World(renderer, viewport);
 			treeCache = new TreeCache(renderer.Device, map, TileMix);
 
 			foreach (TreeReference treeReference in map.Trees)
@@ -65,7 +65,7 @@ namespace OpenRa.Game
 
 			world.Add(new Refinery(24 * new float2(5, 7), 1));
 
-			sidebar = new Sidebar(Race.Soviet, renderer);
+			sidebar = new Sidebar(Race.Soviet, renderer, viewport);
 		}
 
 		internal void Run()
@@ -99,20 +99,7 @@ namespace OpenRa.Game
 
 		void Frame()
 		{
-			float2 r1 = new float2(2, -2) / viewport.Size;
-			float2 r2 = new float2(-1, 1);
-
-			renderer.BeginFrame(r1, r2, viewport.Location);
-
-			renderer.Device.EnableScissor(0, 0, viewport.ClientSize.Width - 128, viewport.ClientSize.Height);
-			terrain.Draw(viewport);
-
-			world.Draw(renderer, viewport);
-
-			renderer.Device.DisableScissor();
-			sidebar.Paint(viewport);
-
-			renderer.EndFrame();
+			viewport.DrawRegions();
 		}
 	}
 }
diff --git a/OpenRa.Game/Region.cs b/OpenRa.Game/Region.cs
index 06a6893262..4b32a04f22 100644
--- a/OpenRa.Game/Region.cs
+++ b/OpenRa.Game/Region.cs
@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Drawing;
+using System.Windows.Forms;
 
 namespace OpenRa.Game
 {
@@ -9,9 +10,9 @@ namespace OpenRa.Game
 	{
 		Point location;
 		Size size;
-		Renderable drawFunction;
+		MethodInvoker drawFunction;
 
-		public Region(Point location, Size size, Renderable drawFunction)
+		public Region(Point location, Size size, MethodInvoker drawFunction)
 		{
 			this.location = location;
 			this.size = size;
@@ -21,7 +22,7 @@ namespace OpenRa.Game
 		public void Draw(Renderer renderer, Viewport viewport)
 		{
 			renderer.Device.EnableScissor(location.X, location.Y, size.Width, size.Height);
-			drawFunction(renderer, viewport);
+			drawFunction();
 			renderer.Device.DisableScissor();
 		}
 	}
diff --git a/OpenRa.Game/Sidebar.cs b/OpenRa.Game/Sidebar.cs
index 3ed95bc27d..8dbe2fbb80 100644
--- a/OpenRa.Game/Sidebar.cs
+++ b/OpenRa.Game/Sidebar.cs
@@ -6,6 +6,7 @@ using BluntDirectX.Direct3D;
 using OpenRa.FileFormats;
 using System.Drawing;
 using System.IO;
+using System.Windows.Forms;
 
 namespace OpenRa.Game
 {
@@ -19,9 +20,12 @@ namespace OpenRa.Game
 		Sprite blank;
 
 		Dictionary<string, Sprite> sprites = new Dictionary<string,Sprite>();
+		Viewport viewport;
 
-		public Sidebar(Race race, Renderer renderer)
+		public Sidebar(Race race, Renderer renderer, Viewport viewport)
 		{
+			this.viewport = viewport;
+			viewport.RequestRegion(AnchorStyles.Right, 128, Paint);
 			techTree.CurrentRace = race;
 			techTree.Build("FACT", true);
 			spriteRenderer = new SpriteRenderer(renderer, false);
@@ -54,7 +58,7 @@ namespace OpenRa.Game
 				DrawSprite(blank, ref p);
 		}
 
-		public void Paint(Viewport viewport)
+		public void Paint()
 		{
 			float2 buildPos = viewport.Location + new float2(viewport.ClientSize.Width - 128, 0);
 			float2 unitPos = viewport.Location + new float2(viewport.ClientSize.Width - 64, 0);
diff --git a/OpenRa.Game/TerrainRenderer.cs b/OpenRa.Game/TerrainRenderer.cs
index 7ea704b36d..3a50a7d280 100644
--- a/OpenRa.Game/TerrainRenderer.cs
+++ b/OpenRa.Game/TerrainRenderer.cs
@@ -5,6 +5,7 @@ using OpenRa.FileFormats;
 using BluntDirectX.Direct3D;
 using System.Drawing;
 using System.IO;
+using System.Windows.Forms;
 
 namespace OpenRa.Game
 {
@@ -14,13 +15,16 @@ namespace OpenRa.Game
 		IndexBuffer indexBuffer;
 		Sheet terrainSheet;
 		TileSet tileSet;
+		Viewport viewport;
 
 		Renderer renderer;
 		Map map;
 
-		public TerrainRenderer(Renderer renderer, Map map, Package tilePackage)
+		public TerrainRenderer(Renderer renderer, Map map, Package tilePackage, Viewport viewport)
 		{
 			this.renderer = renderer;
+			this.viewport = viewport;
+			viewport.RequestRegion(AnchorStyles.Left, viewport.ClientSize.Width - 128, Draw);
 			this.map = map;
 
 			tileSet = new TileSet(tilePackage, map.TileSuffix);
@@ -54,7 +58,7 @@ namespace OpenRa.Game
 			indexBuffer.SetData(indices.ToArray());
 		}
 
-		public void Draw( Viewport viewport )
+		public void Draw()
 		{
 			int indicesPerRow = map.Width * 6;
 			int verticesPerRow = map.Width * 4;
diff --git a/OpenRa.Game/Viewport.cs b/OpenRa.Game/Viewport.cs
index 35be9c271f..32f8380f07 100644
--- a/OpenRa.Game/Viewport.cs
+++ b/OpenRa.Game/Viewport.cs
@@ -7,7 +7,6 @@ using BluntDirectX.Direct3D;
 
 namespace OpenRa.Game
 {
-	delegate void Renderable(Renderer renderer, Viewport viewport);
 	class Viewport
 	{
 		readonly Size clientSize;
@@ -34,7 +33,7 @@ namespace OpenRa.Game
 		}
 
 		List<Region> regions = new List<Region>();
-		public void ResquestRegion(AnchorStyles anchor, int distanceFromAnchor, Renderable drawFunction)
+		public void RequestRegion(AnchorStyles anchor, int distanceFromAnchor, MethodInvoker drawFunction)
 		{
 			switch (anchor)
 			{
@@ -57,8 +56,15 @@ namespace OpenRa.Game
 
 		public void DrawRegions()
 		{
+			float2 r1 = new float2(2.0f / clientSize.Width, -2.0f / clientSize.Height);
+			float2 r2 = new float2(-1, 1);
+			
+			renderer.BeginFrame(r1, r2, scrollPosition);
+
 			foreach (Region region in regions)
 				region.Draw(renderer, this);
+
+			renderer.EndFrame();
 		}
 	}
 }
diff --git a/OpenRa.Game/World.cs b/OpenRa.Game/World.cs
index 6c1e1cd403..4c26ae4108 100644
--- a/OpenRa.Game/World.cs
+++ b/OpenRa.Game/World.cs
@@ -4,6 +4,7 @@ using System.Text;
 using BluntDirectX.Direct3D;
 using OpenRa.FileFormats;
 using System.Drawing;
+using System.Windows.Forms;
 
 namespace OpenRa.Game
 {
@@ -11,12 +12,20 @@ namespace OpenRa.Game
 	{
 		List<Actor> actors = new List<Actor>();
 		SpriteRenderer spriteRenderer;
+		Renderer renderer;
+		Viewport viewport;
 
-		public World(Renderer renderer) { spriteRenderer = new SpriteRenderer(renderer, true); }
+		public World(Renderer renderer, Viewport viewport)
+		{
+			this.renderer = renderer;
+			this.viewport = viewport;
+			viewport.RequestRegion(AnchorStyles.Left, viewport.ClientSize.Width - 128, Draw);
+			spriteRenderer = new SpriteRenderer(renderer, true);
+		}
 
 		public void Add(Actor a) { actors.Add(a); }
 
-		public void Draw(Renderer renderer, Viewport viewport)
+		public void Draw()
 		{
 			Range<float2> range = new Range<float2>(viewport.Location, viewport.Size);