diff --git a/OpenRA.Game/Graphics/VoxelLoader.cs b/OpenRA.Game/Graphics/VoxelLoader.cs
index 64630e54a2..4153134c32 100644
--- a/OpenRA.Game/Graphics/VoxelLoader.cs
+++ b/OpenRA.Game/Graphics/VoxelLoader.cs
@@ -89,12 +89,14 @@ namespace OpenRA.Graphics
 
 			var channelP = ChannelSelect[(int)s.Channel];
 			var channelC = ChannelSelect[(int)s.Channel + 1];
-			return new Vertex[4]
+			return new Vertex[6]
 			{
 				new Vertex(coord(0, 0), s.Left, s.Top, channelP, channelC),
 				new Vertex(coord(su, 0), s.Right, s.Top, channelP, channelC),
 				new Vertex(coord(su, sv), s.Right, s.Bottom, channelP, channelC),
-				new Vertex(coord(0, sv), s.Left, s.Bottom, channelP, channelC)
+				new Vertex(coord(su, sv), s.Right, s.Bottom, channelP, channelC),
+				new Vertex(coord(0, sv), s.Left, s.Bottom, channelP, channelC),
+				new Vertex(coord(0, 0), s.Left, s.Top, channelP, channelC)
 			};
 		}
 
diff --git a/OpenRA.Game/Graphics/VoxelRenderer.cs b/OpenRA.Game/Graphics/VoxelRenderer.cs
index bd25b01345..a7eb0a3ddf 100644
--- a/OpenRA.Game/Graphics/VoxelRenderer.cs
+++ b/OpenRA.Game/Graphics/VoxelRenderer.cs
@@ -263,7 +263,7 @@ namespace OpenRA.Graphics
 			shader.SetVec("AmbientLight", ambientLight, 3);
 			shader.SetVec("DiffuseLight", diffuseLight, 3);
 
-			shader.Render(() => renderer.DrawBatch(Game.ModData.VoxelLoader.VertexBuffer, renderData.Start, renderData.Count, PrimitiveType.QuadList));
+			shader.Render(() => renderer.DrawBatch(Game.ModData.VoxelLoader.VertexBuffer, renderData.Start, renderData.Count, PrimitiveType.TriangleList));
 		}
 
 		public void BeginFrame()