The Abyss atrium strips were one case: earlier passes measured walls in
short strips against chosen objects, and strips that missed them stayed
open. scripts/truth/notch.py finds every piece up to a metre long that is
open where the pieces either side of it are solid, and checks it against
every solid face within half a metre. 5,343 holes found; 4,096 filled where
the scene is solid; 463 open in the scene stay open. Dara's rulings are
untouched.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>