# HDRP Shader Graph nodes

The High Definition Render Pipeline (HDRP) includes additional [Nodes](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Node.html) for Shader Graph. These nodes allow you to use HDRP-specific features in Shader Graph. For example, you can use a [Diffusion Profile](diffusion-profile-reference.md) node in a Shader Graph that supports [subsurface scattering](skin-and-diffusive-surfaces-subsurface-scattering.md).

HDRP adds the following Shader Graph Nodes:

* [Diffusion Profile](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Diffusion-Profile-Node.html)
* [Emission](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Emission-Node.html)
* [Exposure](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Exposure-Node.html)
* [HD Scene Color](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/HD-Scene-Color-Node.html)
* [HD Scene Depth](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/HD-Scene-Depth-Node.html)
* [HD Sample Buffer](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/HD-Sample-Buffer-Node.html)
* Eye Shader Graph utilities
  * [CirclePupilAnimation](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Circle-Pupil-Animation-Node.html)
  * [CorneaRefraction](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Cornea-Refraction-Node.html)
  * [EyeSurfaceTypeDebug](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Eye-Surface-Type-Debug-Node.html)
  * [IrisLimbalRing](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Iris-Limbal-Ring-Node.html)
  * [IrisOffset](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Iris-Offset-Node.html)
  * [IrisOutOfBoundColorClamp](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Iris-Out-Of-Bound-Color-Clamp-Node.html)
  * [IrisUVLocation](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Iris-UV-Location-Node.html)
  * [ScleraIrisBlend](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Sclera-Iris-Blend-Node.html)
  * [ScleraLimbalRing](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Sclera-Limbal-Ring-Node.html)
  * [ScleraUVLocation](https://docs.unity3d.com/Packages/com.unity.shadergraph@16.0/manual/Sclera-UV-Location-Node.html)