Steps to reproduce:
1. Create new Unity project using Universal 2D Template
2. Create a 2D GameObject (Square)
3. Change Square color to red in Inspector window
4. Add Box Collider 2D and Shadow Caster 2D Components on Square Sprite GameObject
5. With the object selected, confirm the shadow shape outline is drawn in the Scene view (Casting Option defaults to Cast Shadow)
6. Set Casting Option to Self Shadow
7. Look at the Scene view, then repeat with No Shadow
Actual results: The outline disappears for Self Shadow and No Shadow and comes back for Cast Shadow and Cast And Self Shadow.
Expected results: The shape outline stays visible for every Casting Option, as it did before this change: a self-shadowing caster still has a shape worth seeing
Reproducible with versions: 6000.7.0b1 (6f112f2bea37), 7000.0.0a1
Not reproducible with versions: 6000.0.84f1, 6000.3.24f1, 6000.5.11f1, 6000.6.2f1, 6000.7.0a6 (b5c7d4d317b3)
Tested on (OS): macOS 26.6.1 (Apple silicon)