- a drawn animated material — scrolling texture, pulsing tint — is never mutated again: the animation rides delta rows in a shared region of the light buffer, folded branch-free in the shader, with zero as identity
- the churn that came with mutating assets dies by construction — no per-material modified ratchet, no far-twin re-inserts — and capture parity is bit-exact
- the portal flood's answer goes compare-then-write, clearing the ground for a static-visibility lane
- the single-threaded PostUpdate probe answered: cheaper on mean cpu, parked on a tail-latency class, kept as a documented lever
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
