Draw objects in the render graph system in URP

RendererListHandle

Create a list of objects to draw

1. In your

   ScriptableRenderPass

   class, in the class you use for pass data, create a

   RendererListHandle

   field.
   For example:

   class PassData{    public RendererListHandle objectsToDraw;}

2. Create a RendererListParams object that contains the objects to draw, drawing settings, and culling data. For more information about the

   RenderListParams

   object, refer to Creating a simple render loop in a custom render pipeline.
   For a detailed example, refer to Example.
3. In the

   RecordRenderGraph

   method, use the

   CreateRendererList

   API to convert the

   RendererListParams

   object to a handle that the render graph system can use.
   For example:

   RendererListHandle rendererListHandle = renderGraph.CreateRendererList(rendererListParameters);

4. Set the

   RendererListHandle

   field in the pass data.
   For example:

   passData.objectsToDraw = rendererListHandle;

Draw the objects

RendererListHandle

1. In the

   RecordRenderGraph

   method, tell the render graph system to use the list of objects, using the

   UseRendererList

   API.
   For example:

   builder.UseRendererList(passData.rendererListHandle);

2. Set the texture to draw the objects onto. Set both the color texture and the depth texture so URP renders the objects correctly.
   For example, the following tells URP to draw to the color texture and depth texture of the active camera texture.

   UniversalResourceData frameData = frameContext.Get<UniversalResourceData>();builder.SetRenderAttachment(frameData.activeColorTexture, 0);builder.SetRenderAttachmentDepth(frameData.activeDepthTexture, AccessFlags.Write);

3. In your

   SetRenderFunc

   method, draw the renderers using the

   DrawRendererList

   API.
   For example:

   context.cmd.DrawRendererList(passData.rendererListHandle);

Example

Lightmode

UniversalForward

using UnityEngine;using UnityEngine.Rendering;using UnityEngine.Rendering.Universal;using UnityEngine.Rendering.RenderGraphModule; public class DrawObjectsWithOverrideMaterial : ScriptableRendererFeature{    DrawObjectsPass drawObjectsPass;    public Material overrideMaterial;     public override void Create()    {        // Create the render pass that draws the objects, and pass in the override material        drawObjectsPass = new DrawObjectsPass(overrideMaterial);        // Insert render passes after URP's post-processing render pass        drawObjectsPass.renderPassEvent = RenderPassEvent.AfterRenderingPostProcessing;    }     public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)    {        // Add the render pass to the URP rendering loop        renderer.EnqueuePass(drawObjectsPass);    }    class DrawObjectsPass : ScriptableRenderPass    {        private Material materialToUse;        public DrawObjectsPass(Material overrideMaterial)        {            // Set the pass's local copy of the override material             materialToUse = overrideMaterial;        }               class PassData        {            // Create a field to store the list of objects to draw            public RendererListHandle rendererListHandle;        }         public override void RecordRenderGraph(RenderGraph renderGraph, ContextContainer frameContext)        {            using (var builder = renderGraph.AddRasterRenderPass<PassData>("Redraw objects", out var passData))            {                // Get the data needed to create the list of objects to draw                UniversalRenderingData renderingData = frameContext.Get<UniversalRenderingData>();                UniversalCameraData cameraData = frameContext.Get<UniversalCameraData>();                UniversalLightData lightData = frameContext.Get<UniversalLightData>();                SortingCriteria sortFlags = cameraData.defaultOpaqueSortFlags;                RenderQueueRange renderQueueRange = RenderQueueRange.opaque;                FilteringSettings filterSettings = new FilteringSettings(renderQueueRange, ~0);                // Redraw only objects that have their LightMode tag set to UniversalForward                 ShaderTagId shadersToOverride = new ShaderTagId("UniversalForward");                // Create drawing settings                DrawingSettings drawSettings = RenderingUtils.CreateDrawingSettings(shadersToOverride, renderingData, cameraData, lightData, sortFlags);                // Add the override material to the drawing settings                drawSettings.overrideMaterial = materialToUse;                // Create the list of objects to draw                var rendererListParameters = new RendererListParams(renderingData.cullResults, drawSettings, filterSettings);                // Convert the list to a list handle that the render graph system can use                passData.rendererListHandle = renderGraph.CreateRendererList(rendererListParameters);                                // Set the render target as the color and depth textures of the active camera texture                UniversalResourceData resourceData = frameContext.Get<UniversalResourceData>();                builder.UseRendererList(passData.rendererListHandle);                builder.SetRenderAttachment(resourceData.activeColorTexture, 0);                builder.SetRenderAttachmentDepth(resourceData.activeDepthTexture, AccessFlags.Write);                builder.SetRenderFunc(static (PassData data, RasterGraphContext context) => ExecutePass(data, context));            }        }        static void ExecutePass(PassData data, RasterGraphContext context)        {            // Clear the render target to black            context.cmd.ClearRenderTarget(true, true, Color.black);            // Draw the objects in the list            context.cmd.DrawRendererList(data.rendererListHandle);        }    } }

Additional resources

• Use textures
• Using frame data
• Inject a render pass with a Scriptable Renderer Feature