Transparent objects cannot receive additional light shadows in deferred rendering

Unity Engine
, , , ,
1

Unity 6000.0.34f1
URP 17.0.3
When using deferred rendering, transparent objects cannot receive additionalLight shadows，I found that the reason is that the order of the attributes “_AdditionalShadowParams” and “_AdditionalLightsWorldToShadow” does not correspond to the index of forwardLight.

2

Thanks for flagging this. Could you file a bug report?

Thank you!

3

Sent. Check “AdditionalLightsShadowCasterPass.Setup".

1 Like
4

A new question, in ”UniversalCameraData.cs“.

public Matrix4x4 GetProjectionMatrix(int viewIndex = 0)
{
#if ENABLE_VR && ENABLE_XR_MODULE
    if (xr.enabled)
        return m_JitterMatrix * xr.GetProjMatrix(viewIndex);
#endif
    return m_JitterMatrix * m_ProjectionMatrix;
}

internal Matrix4x4 GetGPUProjectionMatrix(bool renderIntoTexture, int viewIndex = 0)
{
    return m_JitterMatrix * GL.GetGPUProjectionMatrix(GetProjectionMatrix(viewIndex), renderIntoTexture);
}

Should be ？

internal Matrix4x4 GetGPUProjectionMatrix(bool renderIntoTexture, int viewIndex = 0)
{
    return  GL.GetGPUProjectionMatrix(GetProjectionMatrix(viewIndex), renderIntoTexture);
}

When enable TAA, i construct position world space using unity_MatrixInvVP and the depthTexture I get wrong positionWS，changing this solved the problem.

5

Thanks for the bug report. I saw it internally (IN-93606).

Do you use a custom ScripableRenderPass? If yes, could you use GetGPUProjectionMatrixNoJitter there instead?

image
image1758×499 24.5 KB

6

I have tried it, the result is right only when I use “GL.GetGPUProjectionMatrix(GetProjectionMatrix(viewIndex), renderIntoTexture)”.

7

StencilDeferred.hlsl using _ScreenToWorld to calculate the world space without using unity_MatrixInvVP. When using unity_MatrixInvVP, positionWS will jitter.

8

Wrong.

UNITY_MATRIX_I_VP = inverseViewMatrix*(m_JitterMatrix * GL.GetGPUProjectionMatrix(GetProjectionMatrix(viewIndex), renderIntoTexture)).Inverse；
float3 positionWS = ComputeWorldSpacePosition(uv, depth, UNITY_MATRIX_I_VP)；

UNITY_MATRIX_I_VP = inverseViewMatrix*(GL.GetGPUProjectionMatrix(GetProjectionMatrixNoJitter(viewIndex), renderIntoTexture)).Inverse；
float3 positionWS = ComputeWorldSpacePosition(uv, depth, UNITY_MATRIX_I_VP)；

Correct

UNITY_MATRIX_I_VP = inverseViewMatrix*(GL.GetGPUProjectionMatrix(GetProjectionMatrix(viewIndex), renderIntoTexture)).Inverse；
float3 positionWS = ComputeWorldSpacePosition(uv, depth, UNITY_MATRIX_I_VP)