Custom Render Pass & Custom buffers

Hi,

I'm using the new Custom Pass feature in HDRP.
https://github.com/Unity-Technologies/ScriptableRenderPipeline/pull/4317

My goal is to render the all image in Black and White except for certain objects.

I created a FullScreenCustomPass with a shader that output the grayscale version of the image.

Now, I would need to not do that on the objects I tag.

If I can avoid using Layers to do it, that would be great.

I saw that there is a "SampleCustomColor(float2 uv)" in the shader template for FullScreenPass.

It seems that I could write to a custom buffer, which would be perfect for my case.

I could write red on every objects I want to isolate from the grayscale.

But I didn't find anything on how, where, to write to the custom buffer.

Can someone have an insight on that ?

Or maybe a better solution ?

Thank you

 

Thanks Antoine !
I'll check that ASAP.

 

@antoinel_unity I am trying to copy the result of DrawRenderersCustomPass to the render texture, to use it in the UI. I am trying the following code:

Code (CSharp):

1. public class RenderToTexturePass : DrawRenderersCustomPass {
2.         public RenderTexture renderTexture;
3.  
4.         protected override void Execute(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera hdCamera, CullingResults cullingResult) {
5.             base.Execute(renderContext, cmd, hdCamera, cullingResult);
6.  
7.             GetCustomBuffers(out RTHandle color, out _);
8.  
9.             cmd.CopyTexture(color, renderTexture);
10.         }
11.     }

The render texture and the color buffer formats (r16g16b16a16_SFloat) and width/height are the same . But I am getting the following error in the console:

Code (CSharp):

1. Graphics.CopyTexture called with mismatching texture types (src=5 dst=2)
2.  

What am I missing?

 

@antoinel_unity I'm trying to understand the custom pass API, basing my work off the examples you have provided. In my case, I need an outline on a single object, not a whole layer, and I can't put it in a separate layer (because I'm using it for physics logic). You mentioned using the rendering layer mask but I can't figure out how to actually use this. I tried replacing this block of code

Code (CSharp):

1. void DrawOutlineMeshes(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera hdCamera, CullingResults cullingResult) {
2.     var result = new RendererListDesc(shaderTags, cullingResult, hdCamera.camera) {
3.         // We need the lighting render configuration to support rendering lit objects
4.         rendererConfiguration = PerObjectData.LightProbe | PerObjectData.LightProbeProxyVolume | PerObjectData.Lightmaps,
5.         renderQueueRange = RenderQueueRange.all,
6.         sortingCriteria = SortingCriteria.BackToFront,
7.         excludeObjectMotionVectors = false,
8.         layerMask = outlineLayer,
9.     };
10.     CoreUtils.SetRenderTarget(cmd, outlineBuffer, ClearFlag.Color);
11.     HDUtils.DrawRendererList(renderContext, cmd, RendererList.Create(result));
12. }

with the following:

Code (CSharp):

1. void DrawOutlineMeshes(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera hdCamera, CullingResults cullingResult) {
2.     DrawingSettings drawingSettings = new DrawingSettings() {
3.         perObjectData=(PerObjectData.LightProbe | PerObjectData.LightProbeProxyVolume | PerObjectData.Lightmaps),
4.         sortingSettings=new SortingSettings(hdCamera.camera),
5.     };
6.     FilteringSettings filteringSettings = FilteringSettings.defaultValue;
7.     CoreUtils.SetRenderTarget(cmd, outlineBuffer, ClearFlag.Color);
8.     renderContext.ExecuteCommandBuffer(cmd);
9.     cmd.Clear();
10.     renderContext.DrawRenderers(cullingResult, ref drawingSettings, ref filteringSettings);
11. }

and tried all kinds of variations of the filter/drawing settings, but I couldn't get the outlines to actually show up. I'm not sure if my renderingLayerMask was wrong, since I couldn't expose this as an enum field in the editor - I ended up opening the debug mode inspector, copying the uint value of the mask of a renderer, and pasting it into my code, to no avail.

My question is: what am I doing wrong here? Or alternatively, is there a way to specify a list of renderers explicitly?

 

@Elynwir and anyone else that comes here I just figured this out

Code (CSharp):

1.         void DrawOutlineMeshes(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera hdCamera, CullingResults cullingResult)
2.         {
3.             var result = new RendererListDesc(shaderTags, cullingResult, hdCamera.camera)
4.             {
5.                 // We need the lighting render configuration to support rendering lit objects
6.                 rendererConfiguration = PerObjectData.LightProbe | PerObjectData.LightProbeProxyVolume | PerObjectData.Lightmaps,
7.                 renderQueueRange = RenderQueueRange.all,
8.                 sortingCriteria = SortingCriteria.BackToFront,
9.                 excludeObjectMotionVectors = false
10.             };
11.  
12.             CoreUtils.SetRenderTarget(cmd, outlineBuffer, ClearFlag.Color);
13.  
14.             RendererList renderList = RendererList.Create(result);
15.             renderList.filteringSettings.renderingLayerMask = 1 << 7;
16.  
17.             HDUtils.DrawRendererList(renderContext, cmd, renderList);
18.         }