Steps to reproduce:

• Open "Scenes/SampleScene" in the attached project
• Look at the game view rendering

Result:
!image-2022-12-16-14-24-48-979.png!

Expected:

Quad objects on the right (Low Resolution) should look similar to the ones on the left (Default).

Notes:

Issue reported by a user on the forum here : [https://forum.unity.com/threads/low-resolution-rendering-pass-with-scene-depth-are-broken.1374471/]  A work around has been provided, but a fix in the source code would be better.

The issue seems to be cause by the _ScreenSize value not beeing updated in the shaders constant buffer when rendering the low resolution transparents pass.
I was able to fix the issue by updating it in HDRenderPipeline.RenderGraph.cs (L1189) with the following code change, but it is probably not a clean fix:

 
{code:java}
TextureHandle RenderLowResTransparent(RenderGraph renderGraph, HDCamera hdCamera, TextureHandle downsampledDepth, CullingResults cullingResults, RendererListHandle rendererList)
{
  using (var builder = renderGraph.AddRenderPass<RenderLowResTransparentPassData>("Low Res Transparent", out var passData, ProfilingSampler.Get(HDProfileId.LowResTransparent)))
  {
    passData.globalCB = m_ShaderVariablesGlobalCB;
    passData.lowResScale = hdCamera.lowResScale;
    passData.frameSettings = hdCamera.frameSettings;
    passData.rendererList = builder.UseRendererList(rendererList);
    builder.UseDepthBuffer(downsampledDepth, DepthAccess.ReadWrite);
    // We need R16G16B16A16_SFloat as we need a proper alpha channel for compositing.
    var output = builder.UseColorBuffer(renderGraph.CreateTexture(new TextureDesc(Vector2.one * hdCamera.lowResScale, true, true)
      { colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, clearBuffer = true, clearColor = Color.black, name = "Low res transparent" }), 0);    builder.SetRenderFunc(
      (RenderLowResTransparentPassData data, RenderGraphContext context) =>
      {
        UpdateOffscreenRenderingConstants(ref data.globalCB, true, 1.0f / data.lowResScale);
        
        var origSize = data.globalCB._ScreenSize; // FIX
        data.globalCB._ScreenSize = Vector4.Scale(data.globalCB._ScreenSize, new Vector4(2f, 2f, 0.5f, 0.5f)); // FIX

ConstantBuffer.PushGlobal(context.cmd, data.globalCB, HDShaderIDs._ShaderVariablesGlobal);
DrawTransparentRendererList(context.renderContext, context.cmd, data.frameSettings, data.rendererList);
UpdateOffscreenRenderingConstants(ref data.globalCB, false, 1.0f);
        
        data.globalCB._ScreenSize = origSize; // FIX
        
        ConstantBuffer.PushGlobal(context.cmd, data.globalCB, HDShaderIDs._ShaderVariablesGlobal);
      });    return output;
  }
} {code}
 

A test scene was added here : https://github.cds.internal.unity3d.com/unity/unity/pull/21223