Forward+ Rendering doesn't work in Direct3D11

I tried to use Forward+ rendering path in PC, it works well in Direct3D12 and Vulkan API, while doesn't work in Direct3D11.

Tested in 2021.3.2f, URP 12.1.6

 

What does not work exactly?

 

The Additional lights calculate doesn't work. The screenshots are captured in URP's default sample, which contains a spot additional light.
Actually, it seems to result from the Constant Buffer "AdditionalLightsZBins" and "AdditionalLightsTiles".In DX11, they are all set to 0 in GPU(CPU works well), which miscalculate additional lights.

 

I suggest making a bug report on this

 

Curious how you enabled this - have been keeping my eyes peeled for it but can't find the option (or how to expose it).

 

Add the define symbol to your project.
Symbol : URP_ENABLE_CLUSTERED_UI

 

How does this enable Forward+?

 

Check my last reply.

 

I just found another bug on URP12 forward+
Open the spot light, it goes well. Close the spot light, the light still bright the scene

 

Is the API problem caused by the C++ Code of Unity engine? I mean, Is there a way to fix this in earliler Unity versions?

 

hey @peterbay any chance you could give more info on this potential DX11 fix in earlier version? (2021.1 here) I tried a bunch of things and couldn't get it to fix. I tried different sizes in SetData(), SetGlobalConstantBuffer(), GraphicsBuffer instead of ComputeBuffer, persistent NativeArrays like in F+ v2 (but m_TileLightMasks length varies in v1)

Here's a refresher of F+ v1:

Code (CSharp):

1. internal static int maxZBins => 1024 * 4;
2. internal static int maxTileVec4s => 4096;
3.  
4. NativeArray<ZBin> m_ZBins;
5. NativeArray<uint> m_TileLightMasks;
6.  
7. m_ZBinBuffer = new ComputeBuffer(UniversalRenderPipeline.maxZBins / 4, UnsafeUtility.SizeOf<float4>(), ComputeBufferType.Constant, ComputeBufferMode.Dynamic);
8. m_TileBuffer = new ComputeBuffer(UniversalRenderPipeline.maxTileVec4s, UnsafeUtility.SizeOf<float4>(), ComputeBufferType.Constant, ComputeBufferMode.Dynamic);
9.  
10. m_ZBins = new NativeArray<ZBin>(binCount, Allocator.TempJob); // seems constant to 4096
11. m_TileLightMasks = new NativeArray<uint>(((m_TileResolution.x * m_TileResolution.y * (wordsPerTile) + 3) / 4) * 4, Allocator.TempJob); // this one varies a lot
12.  
13. m_ZBinBuffer.SetData(m_ZBins.Reinterpret<float4>(UnsafeUtility.SizeOf<ZBin>()), 0, 0, m_ZBins.Length / 4);
14. m_TileBuffer.SetData(m_TileLightMasks.Reinterpret<float4>(UnsafeUtility.SizeOf<uint>()), 0, 0, m_TileLightMasks.Length / 4);
15.  
16. cmd.SetGlobalConstantBuffer(m_ZBinBuffer, "AdditionalLightsZBins", 0, m_ZBins.Length * 4);
17. cmd.SetGlobalConstantBuffer(m_TileBuffer, "AdditionalLightsTiles", 0, m_TileLightMasks.Length * 4);

Thanks

 

Thanks @peterbay ! I managed to get it working by using proper array lengths and SetData(NativeArray). I had to use GraphicsBuffer tho. ComputeBuffer doesn't wanna work even with the full update SetData, so maybe double check it is fixed too?