microsoft · scm-xbox · Jul 20, 2026 · Jun 8, 2026 · Jul 14, 2026 · Jul 14, 2026
diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
@@ -335,11 +335,37 @@ When reviewing documentation, do the following:
 - Don't fix pre-existing issues unrelated to your task. However, if you discover bugs directly caused by or tightly coupled to the code you're changing, fix those too.
 - Update documentation if it is directly related to the changes you are making.
 - Always validate that your changes don't break existing behavior.
-- Only run linters, builds and tests that already exist. Do not add new linting, building or testing tools unless necessary.
-- Use the smallest targeted test, build, or lint command that covers the changed behavior.
+
+### Linting, Building, Testing
+
+- Only run linters, builds and tests that already exist. Do not add new linting, building or testing tools unless necessary for the task.
+- Use the smallest targeted test, build, or lint command that covers the changed behavior. When related targeted selectors use the same runner, include them in one invocation; escalate to full-suite or baseline runs only when targeted validation shows they are needed.
+- Documentation changes do not need to be linted, built or tested unless there are specific tests for documentation.
+
+### Using Ecosystem Tools
+
 - Prefer ecosystem tools (package managers, scaffolding, refactoring tools, linters) over manual changes.
-- Only comment code that needs clarification. Do not comment otherwise.
+- Install packages only when changing dependencies or after a missing-dependency failure.
+
+### Code Commenting Style
+
+- Only comment code that needs a bit of clarification. Do not comment otherwise.
 
 ## Release Process
 
 The release process is documented in the [release skill](.github/skills/release/SKILL.md). Invoke the `release` skill for step-by-step guidance when performing a release.
+
+## CoPilot Skills
+
+The project includes published CoPilot skills for developers:
+
+- **Release-Process**: Guide for performing the DirectX Tool Kit release process. Invoked when asked to help with releasing a new version, publishing packages, or updating ports. See [Release Process skill](.github/skills/release/SKILL.md) for details.
+- **directxtk12-usage**: Provides usage guidance for the DirectX Tool Kit for DX12 library. Located in the `skills/directxtk12-usage/` directory.
+- **directxtk12-tutorial**: Provides an interactive tutorial which can create a project, add the toolkit, and implement features in a step-by-step fashion. Located in the `skills/directxtk12-tutorial` directory.
+
+To use these skills in the Copilot CLI:
+
+```bash
+/skills list
+/skills search directxtk12
+```
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -151,6 +151,7 @@ set(LIBRARY_SOURCES
     Src/ModelLoadSDKMESH.cpp
     Src/ModelLoadVBO.cpp
     Src/NormalMapEffect.cpp
+    Src/NPREffect.cpp
     Src/PBREffect.cpp
     Src/PBREffectFactory.cpp
     Src/pch.h
@@ -172,6 +173,7 @@ set(SHADER_SOURCES
     Src/Shaders/EnvironmentMapEffect.fx
     Src/Shaders/GenerateMips.hlsl
     Src/Shaders/NormalMapEffect.fx
+    Src/Shaders/NPREffect.fx
     Src/Shaders/PBREffect.fx
     Src/Shaders/PostProcess.fx
     Src/Shaders/RootSig.fxh

diff --git a/DirectXTK_Desktop_2022_Win10.vcxproj b/DirectXTK_Desktop_2022_Win10.vcxproj
@@ -111,6 +111,7 @@
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\GraphicsMemory.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -193,6 +194,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{3E0E8608-CD9B-4C76-AF33-29CA38F2C9F0}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>

diff --git a/DirectXTK_Desktop_2022_Win10.vcxproj.filters b/DirectXTK_Desktop_2022_Win10.vcxproj.filters
@@ -281,6 +281,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\EffectPipelineStateDescription.cpp">
       <Filter>Src</Filter>
     </ClCompile>
@@ -376,6 +379,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="README.md" />
     <None Include="Src\Shaders\Skinning.fxh">
       <Filter>Src\Shaders\Shared</Filter>

diff --git a/DirectXTK_Desktop_2026.vcxproj b/DirectXTK_Desktop_2026.vcxproj
@@ -111,6 +111,7 @@
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\GraphicsMemory.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -193,6 +194,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{3E0E8608-CD9B-4C76-AF33-29CA38F2C9F0}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>

diff --git a/DirectXTK_Desktop_2026.vcxproj.filters b/DirectXTK_Desktop_2026.vcxproj.filters
@@ -281,6 +281,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\EffectPipelineStateDescription.cpp">
       <Filter>Src</Filter>
     </ClCompile>
@@ -376,6 +379,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="README.md" />
     <None Include="Src\Shaders\Skinning.fxh">
       <Filter>Src\Shaders\Shared</Filter>

diff --git a/DirectXTK_GDKW_2022.vcxproj b/DirectXTK_GDKW_2022.vcxproj
@@ -438,6 +438,7 @@
     <ClCompile Include="Src\ModelLoadVBO.cpp" />
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -511,6 +512,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets" />
   <Target Name="GDKEditionCheck" BeforeTargets="PrepareForBuild" Condition="'$(GDKCrossPlatform)'=='true'">

diff --git a/DirectXTK_GDKW_2022.vcxproj.filters b/DirectXTK_GDKW_2022.vcxproj.filters
@@ -260,6 +260,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\PBREffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
@@ -346,6 +349,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="Src\Shaders\DualTextureEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>

diff --git a/DirectXTK_GDKX_2022.vcxproj b/DirectXTK_GDKX_2022.vcxproj
@@ -612,6 +612,7 @@
     <ClCompile Include="Src\ModelLoadVBO.cpp" />
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -693,6 +694,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets" />
   <Target Name="GDKEditionCheck" BeforeTargets="PrepareForBuild" Condition="'$(GDKCrossPlatform)'=='true' AND '$(Platform)'=='x64'">

diff --git a/DirectXTK_GDKX_2022.vcxproj.filters b/DirectXTK_GDKX_2022.vcxproj.filters
@@ -266,6 +266,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\PBREffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
@@ -355,6 +358,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="Src\Shaders\DualTextureEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>

diff --git a/DirectXTK_GDKX_2026.vcxproj b/DirectXTK_GDKX_2026.vcxproj
@@ -612,6 +612,7 @@
     <ClCompile Include="Src\ModelLoadVBO.cpp" />
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -693,6 +694,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets" />
   <Target Name="GDKEditionCheck" BeforeTargets="PrepareForBuild" Condition="'$(GDKCrossPlatform)'=='true' AND '$(Platform)'=='x64'">

diff --git a/DirectXTK_GDKX_2026.vcxproj.filters b/DirectXTK_GDKX_2026.vcxproj.filters
@@ -266,6 +266,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\PBREffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
@@ -355,6 +358,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="Src\Shaders\DualTextureEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>

diff --git a/DirectXTK_GDK_2022.vcxproj b/DirectXTK_GDK_2022.vcxproj
@@ -597,6 +597,7 @@
     <ClCompile Include="Src\ModelLoadVBO.cpp" />
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -678,6 +679,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets" />
   <Target Name="EnsureGDK" BeforeTargets="_CheckForInvalidConfigurationAndPlatform" Condition="$([System.Text.RegularExpressions.Regex]::IsMatch('$(Platform)', 'Gaming\..+\.x64'))">

diff --git a/DirectXTK_GDK_2022.vcxproj.filters b/DirectXTK_GDK_2022.vcxproj.filters
@@ -266,6 +266,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\PBREffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
@@ -355,6 +358,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="Src\Shaders\DualTextureEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>

diff --git a/DirectXTK_Windows10_2022.vcxproj b/DirectXTK_Windows10_2022.vcxproj
@@ -124,6 +124,7 @@
     <ClCompile Include="Src\ModelLoadVBO.cpp" />
     <ClCompile Include="Src\Mouse.cpp" />
     <ClCompile Include="Src\NormalMapEffect.cpp" />
+    <ClCompile Include="Src\NPREffect.cpp" />
     <ClCompile Include="Src\PBREffect.cpp" />
     <ClCompile Include="Src\PBREffectFactory.cpp" />
     <ClCompile Include="Src\pch.cpp">
@@ -195,6 +196,11 @@
       <FileType>Document</FileType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <FileType>Document</FileType>
+    </None>
+  </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{945B8F0E-AE5F-447C-933A-9D069532D3E4}</ProjectGuid>
     <Keyword>StaticLibrary</Keyword>

diff --git a/DirectXTK_Windows10_2022.vcxproj.filters b/DirectXTK_Windows10_2022.vcxproj.filters
@@ -221,6 +221,9 @@
     <None Include="Src\Shaders\DebugEffect.fx">
       <Filter>Src\Shaders</Filter>
     </None>
+    <None Include="Src\Shaders\NPREffect.fx">
+      <Filter>Src\Shaders</Filter>
+    </None>
     <None Include="README.md" />
     <None Include="Src\Shaders\Skinning.fxh">
       <Filter>Src\Shaders\Shared</Filter>
@@ -350,6 +353,9 @@
     <ClCompile Include="Src\NormalMapEffect.cpp">
       <Filter>Src</Filter>
     </ClCompile>
+    <ClCompile Include="Src\NPREffect.cpp">
+      <Filter>Src</Filter>
+    </ClCompile>
     <ClCompile Include="Src\EffectPipelineStateDescription.cpp">
       <Filter>Src</Filter>
     </ClCompile>