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Planar shadows do not render when using the New Render Pipeline in Cocos Creator 3.8.8 #19158

@BenoitFreslon

Description

@BenoitFreslon

Cocos Creator version

3.8.8

System information

Windows 11

Issue description

Hello,

I found what seems to be an issue with planar shadows in Cocos Creator 3.8.8.

Description

Planar shadows render correctly when using the Legacy Pipeline, but they do not appear at all when using the New Render Pipeline.

The exact same scene works in one project and not in another, and after comparing both projects, the difference comes from the render pipeline:

Project where planar shadows work: Legacy Pipeline
Project where planar shadows do not work: New Render Pipeline

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Relevant error log output

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Steps to reproduce

Steps to reproduce
Create a new project in Cocos Creator 3.8.8
Enable the New Render Pipeline
Create a simple scene with:
one Directional Light
one MeshRenderer object (for example a sphere or cube)
In the Scene settings:
enable Shadows
set Type to Planar
set Plane Direction to (0, 1, 0)
set Plane Height to 0
On the mesh object:
enable Cast Shadow
On the directional light:
enable shadows
Run the scene
Expected result

The mesh should display a planar shadow on the ground plane.

Actual result

No planar shadow is rendered when using the New Render Pipeline.

Minimal reproduction project

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