Setting light.shadowOrthoScale to 0 will cause banded abnormal shadows

Bugs
1

setting light.shadowOrthoScale to 0 will cause banded abnormal shadows.

截屏2025-12-29 10.53.35
截屏2025-12-29 10.53.351920×1113 224 KB

https://playground.babylonjs.com/#FILVC3

In the implementation of PCF and PCSS algorithms, is there a lack of constraints on uvDepth.xy?

截屏2025-12-29 10.51.15
截屏2025-12-29 10.51.151920×1337 222 KB

2

Thanks for reporting, this PR will fix the problem:

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