Inject a render pass with a Scriptable Renderer Feature in URP

ScriptableRenderFeature

1. Create a new C# script.
2. Replace the code with a class that inherits from the

   ScriptableRendererFeature

   class.

   using UnityEngine;using UnityEngine.Rendering.Universal;public class MyRendererFeature : ScriptableRendererFeature{}

3. In the class, override the

   Create

   method. For example:

   public override void Create(){}

   URP calls the

   Create

   methods on the following events:
   • When the Scriptable Renderer Feature loads the first time.
   • When you enable or disable the Scriptable Renderer Feature.
   • When you change a property in the
     Inspector

     ?

     window of the Renderer Feature.
4. In the

   Create

   method, create an instance of your Scriptable Render Pass, and inject it into the renderer.
   For example, if you have a Scriptable Render Pass called

   RedTintRenderPass

   :

   // Define an instance of the Scriptable Render Passprivate RedTintRenderPass redTintRenderPass;public override void Create(){    // Create an instance of the Scriptable Render Pass    redTintRenderPass = new RedTintRenderPass();    // Inject the render pass after rendering the skybox    redTintRenderPass.renderPassEvent = RenderPassEvent.AfterRenderingSkybox;}

   You can also use the

   Create

   method to initialize any other resources the Scriptable Renderer Feature needs, such as materials.
5. Override the

   AddRenderPasses

   method.

   public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData){}

   URP calls the

   AddRenderPasses

   method every frame, once for each camera. Don't create or instantiate any resources within this method.
6. Use the

   EnqueuePass

   API to inject the Scriptable Render Pass into the frame rendering loop.

   public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData){    renderer.EnqueuePass(redTintRenderPass);}

   To add a render pass to a specific camera only, use an

   if

   statement to check the camera type. For example:

   if (renderingData.cameraData.cameraType == CameraType.Game){    renderer.EnqueuePass(redTintRenderPass);}

Dispose

Example

1. Import the URP render graph samples. For more information, refer to Importing a package sample in URP.
2. In the Project window, go to Samples > Universal Render Pipeline > <your version> > URP RenderGraph Samples > BlitWithMaterial.

Additional resources

• ScriptableRendererFeature

• Add a Renderer Feature to a URP Renderer
• Restrict a render pass to a scene area
• Create a custom post-processing effect with Volume support in URP
• Custom render pass workflow in URP
• Render graph system