diff --git a/OpenRA.Game/Graphics/ModelRenderer.cs b/OpenRA.Game/Graphics/ModelRenderer.cs
index 20b5a777db..5761ca4f26 100644
--- a/OpenRA.Game/Graphics/ModelRenderer.cs
+++ b/OpenRA.Game/Graphics/ModelRenderer.cs
@@ -64,10 +64,10 @@ namespace OpenRA.Graphics
 			shader.SetTexture("Palette", palette);
 		}
 
-		public void SetViewportParams(Size screen, float zoom, int2 scroll)
+		public void SetViewportParams(Size screen, int2 scroll)
 		{
 			var a = 2f / renderer.SheetSize;
-			var view = new float[]
+			var view = new[]
 			{
 				a, 0, 0, 0,
 				0, -a, 0, 0,
diff --git a/OpenRA.Game/Graphics/SpriteRenderer.cs b/OpenRA.Game/Graphics/SpriteRenderer.cs
index 1193f449c8..620b4dfd79 100644
--- a/OpenRA.Game/Graphics/SpriteRenderer.cs
+++ b/OpenRA.Game/Graphics/SpriteRenderer.cs
@@ -155,17 +155,17 @@ namespace OpenRA.Graphics
 			shader.SetTexture("Palette", palette);
 		}
 
-		public void SetViewportParams(Size screen, float depthScale, float depthOffset, float zoom, int2 scroll)
+		public void SetViewportParams(Size screen, float depthScale, float depthOffset, int2 scroll)
 		{
 			shader.SetVec("Scroll", scroll.X, scroll.Y, scroll.Y);
 			shader.SetVec("r1",
-				zoom * 2f / screen.Width,
-				zoom * 2f / screen.Height,
-				-depthScale * zoom / screen.Height);
+				2f / screen.Width,
+				2f / screen.Height,
+				-depthScale / screen.Height);
 			shader.SetVec("r2", -1, -1, 1 - depthOffset);
 
 			// Texture index is sampled as a float, so convert to pixels then scale
-			shader.SetVec("DepthTextureScale", 128 * depthScale * zoom / screen.Height);
+			shader.SetVec("DepthTextureScale", 128 * depthScale / screen.Height);
 		}
 
 		public void SetDepthPreviewEnabled(bool enabled)
diff --git a/OpenRA.Game/Renderer.cs b/OpenRA.Game/Renderer.cs
index 70a1c8e103..d41cc9e600 100644
--- a/OpenRA.Game/Renderer.cs
+++ b/OpenRA.Game/Renderer.cs
@@ -161,7 +161,7 @@ namespace OpenRA
 			var bufferSize = new Size((int)(surfaceBufferSize.Width / scale), (int)(surfaceBufferSize.Height / scale));
 			if (lastBufferSize != bufferSize)
 			{
-				SpriteRenderer.SetViewportParams(bufferSize, 0f, 0f, 1f, int2.Zero);
+				SpriteRenderer.SetViewportParams(bufferSize, 0f, 0f, int2.Zero);
 				lastBufferSize = bufferSize;
 			}
 		}
@@ -194,8 +194,8 @@ namespace OpenRA
 			if (worldBufferSize != lastWorldBufferSize || lastWorldViewport != worldViewport)
 			{
 				var depthScale = worldBufferSize.Height / (worldBufferSize.Height + depthMargin);
-				WorldSpriteRenderer.SetViewportParams(worldBufferSize, depthScale, depthScale / 2, 1f, worldViewport.Location);
-				WorldModelRenderer.SetViewportParams(worldBufferSize, 1f, worldViewport.Location);
+				WorldSpriteRenderer.SetViewportParams(worldBufferSize, depthScale, depthScale / 2, worldViewport.Location);
+				WorldModelRenderer.SetViewportParams(worldBufferSize, worldViewport.Location);
 
 				lastWorldViewport = worldViewport;
 				lastWorldBufferSize = worldBufferSize;