ShadowMaskModel: Fix signatures.

[Mugen87]

Fixed #30762.

Description

The direct() and finish() methods of ShadowMaskModel have outdated signatures. It seems when refactoring shadow and lighting related code the interface of this class was overlooked.

The PR restores ShadowMaterial with WebGPURenderer. However, ShadowNodeMaterial does not show the shadow mask for some reason. The following fiddles is using ShadowMaterial and fixed with the PR but when using ShadowNodeMaterial, the plane gets black. https://jsfiddle.net/tbmgkf4s/

@sunag Before I dive into this more deeply, do you have an idea what's going wrong?

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	336.08 78.29	336.08 78.29	+0 B +0 B
WebGPU	525.17 146.28	525.21 146.28	+40 B -5 B
WebGPU Nodes	524.63 146.18	524.67 146.18	+40 B -5 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	465.15 112.18	465.15 112.18	+0 B +0 B
WebGPU	597.97 162.56	598.01 162.57	+40 B +7 B
WebGPU Nodes	553.1 152.04	553.1 152.04	+0 B +0 B

[sunag]

@sunag Before I dive into this more deeply, do you have an idea what's going wrong?

It's probably related to this #30530

The signature of the light model functions has been changed.

[Mugen87]

I've found the issue. ShadowNodeMaterial did not set transparent to true. I've missed that setDefaultValues() only sets values for undefined properties.