Each channel panel (Albedo, Metallic+Smoothness, Occlusion, Emission)
gets a CanvasGroup whose alpha follows its toggle: 1.0 when enabled,
0.5 when disabled. Ensured at runtime in WirePanel (no prefab re-bake),
so both the prefab and code-gen paths behave identically. Panel_BrushSize
has no toggle and is left untouched.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
adminandClaude Opus 4.8
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