diff --git a/Blarg.GameFramework/Blarg.GameFramework.csproj b/Blarg.GameFramework/Blarg.GameFramework.csproj
index 99a9cb3..9a67281 100644
--- a/Blarg.GameFramework/Blarg.GameFramework.csproj
+++ b/Blarg.GameFramework/Blarg.GameFramework.csproj
@@ -126,6 +126,10 @@
     <Compile Include="Support\StringExtensions.cs" />
     <Compile Include="Graphics\ImageFormat.cs" />
     <Compile Include="Graphics\IPlatformBitmap.cs" />
+    <Compile Include="Graphics\CustomShaders\CustomSpriteShader.cs" />
+    <Compile Include="Graphics\CustomShaders\CustomStandardShader.cs" />
+    <Compile Include="Graphics\CustomShaders\CustomVertexLerpShader.cs" />
+    <Compile Include="Graphics\CustomShaders\CustomVertexSkinningShader.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>
@@ -138,6 +142,7 @@
     <Folder Include="Resources\Shaders\" />
     <Folder Include="Graphics\BuiltinShaders\" />
     <Folder Include="Support\" />
+    <Folder Include="Graphics\CustomShaders\" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Resources\Fonts\Vera.ttf" />
diff --git a/Blarg.GameFramework/Graphics/CustomShaders/CustomSpriteShader.cs b/Blarg.GameFramework/Graphics/CustomShaders/CustomSpriteShader.cs
new file mode 100644
index 0000000..7246440
--- /dev/null
+++ b/Blarg.GameFramework/Graphics/CustomShaders/CustomSpriteShader.cs
@@ -0,0 +1,30 @@
+using System;
+using System.IO;
+
+namespace Blarg.GameFramework.Graphics.CustomShaders
+{
+	public class CustomSpriteShader : SpriteShader
+	{
+		public CustomSpriteShader(GraphicsDevice graphicsDevice, string vertexShaderSource, string fragmentShaderSource)
+			: base(graphicsDevice, vertexShaderSource, fragmentShaderSource)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+			if (!HasUniform(TextureHasAlphaOnlyUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", TextureHasAlphaOnlyUniformName));
+		}
+
+		public CustomSpriteShader(GraphicsDevice graphicsDevice, TextReader vertexShaderSourceReader, TextReader fragmentShaderSourceReader)
+			: base(graphicsDevice, vertexShaderSourceReader, fragmentShaderSourceReader)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+			if (!HasUniform(TextureHasAlphaOnlyUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", TextureHasAlphaOnlyUniformName));
+		}
+	}
+}
diff --git a/Blarg.GameFramework/Graphics/CustomShaders/CustomStandardShader.cs b/Blarg.GameFramework/Graphics/CustomShaders/CustomStandardShader.cs
new file mode 100644
index 0000000..b0b2043
--- /dev/null
+++ b/Blarg.GameFramework/Graphics/CustomShaders/CustomStandardShader.cs
@@ -0,0 +1,26 @@
+using System;
+using System.IO;
+
+namespace Blarg.GameFramework.Graphics.CustomShaders
+{
+	public class CustomStandardShader : StandardShader
+	{
+		public CustomStandardShader(GraphicsDevice graphicsDevice, string vertexShaderSource, string fragmentShaderSource)
+			: base(graphicsDevice, vertexShaderSource, fragmentShaderSource)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+		}
+
+		public CustomStandardShader(GraphicsDevice graphicsDevice, TextReader vertexShaderSourceReader, TextReader fragmentShaderSourceReader)
+			: base(graphicsDevice, vertexShaderSourceReader, fragmentShaderSourceReader)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+		}
+	}
+}
diff --git a/Blarg.GameFramework/Graphics/CustomShaders/CustomVertexLerpShader.cs b/Blarg.GameFramework/Graphics/CustomShaders/CustomVertexLerpShader.cs
new file mode 100644
index 0000000..bf3672a
--- /dev/null
+++ b/Blarg.GameFramework/Graphics/CustomShaders/CustomVertexLerpShader.cs
@@ -0,0 +1,30 @@
+using System;
+using System.IO;
+
+namespace Blarg.GameFramework.Graphics.CustomShaders
+{
+	public class CustomVertexLerpShader : VertexLerpShader
+	{
+		public CustomVertexLerpShader(GraphicsDevice graphicsDevice, string vertexShaderSource, string fragmentShaderSource)
+			: base(graphicsDevice, vertexShaderSource, fragmentShaderSource)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+			if (!HasUniform(LerpUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", LerpUniformName));
+		}
+
+		public CustomVertexLerpShader(GraphicsDevice graphicsDevice, TextReader vertexShaderSourceReader, TextReader fragmentShaderSourceReader)
+			: base(graphicsDevice, vertexShaderSourceReader, fragmentShaderSourceReader)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+			if (!HasUniform(LerpUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", LerpUniformName));
+		}
+	}
+}
diff --git a/Blarg.GameFramework/Graphics/CustomShaders/CustomVertexSkinningShader.cs b/Blarg.GameFramework/Graphics/CustomShaders/CustomVertexSkinningShader.cs
new file mode 100644
index 0000000..5506c04
--- /dev/null
+++ b/Blarg.GameFramework/Graphics/CustomShaders/CustomVertexSkinningShader.cs
@@ -0,0 +1,34 @@
+using System;
+using System.IO;
+
+namespace Blarg.GameFramework.Graphics.CustomShaders
+{
+	public class CustomVertexSkinningShader : VertexSkinningShader
+	{
+		public CustomVertexSkinningShader(GraphicsDevice graphicsDevice, string vertexShaderSource, string fragmentShaderSource)
+			: base(graphicsDevice, vertexShaderSource, fragmentShaderSource)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+			if (!HasUniform(JointPositionsUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", JointPositionsUniformName));
+			if (!HasUniform(JointRotationsUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", JointRotationsUniformName));
+		}
+
+		public CustomVertexSkinningShader(GraphicsDevice graphicsDevice, TextReader vertexShaderSourceReader, TextReader fragmentShaderSourceReader)
+			: base(graphicsDevice, vertexShaderSourceReader, fragmentShaderSourceReader)
+		{
+			if (!HasUniform(ModelViewMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ModelViewMatrixUniformName));
+			if (!HasUniform(ProjectionMatrixUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", ProjectionMatrixUniformName));
+			if (!HasUniform(JointPositionsUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", JointPositionsUniformName));
+			if (!HasUniform(JointRotationsUniformName))
+				throw new InvalidOperationException(String.Format("Missing \"{0}\" uniform.", JointRotationsUniformName));
+		}
+	}
+}