Clipping is not correct when material enables transparent and spot-light casts shadow [WebGPU]

[Cerberus]

Description

Current behavior

Clipping an geometry with material additive-blending..
Mesh without set transparent ✅

Spot-light without casting shadow ✅

Enable transparent & cast-shadow ❌

Expected behavior

Clipping correctly with both configs.

---

Another approach

I've tried to set opacity and alphaToCoverage on mesh instead and it works. However this way does not allow to use blending: THREE.AdditiveBlending.

Reproduction steps

Try in demo link and orbit around the object to see clipping behavior.

Code

The clipping behavior is not correct when enable..

spotLight.castShadow = true // spotLight
transparent: true // mesh

Live example

https://stackblitz.com/edit/stackblitz-starters-tezjmh?file=index.html

Screenshots

No response

Version

0.164.1

Device

Desktop

Browser

Chrome

OS

MacOS

[aardgoose]

I have a fix for this, and will push a PR soon.