Biological recordings are intangible and unaware, but loose objects retain real mass and recorded motion until crawlers, mobs, or accidents disturb them.
The floor reproduces Earth's surface and inhabitants at a captured moment. People and animals proceed through recorded routines as invisible-to-map ghosts that cannot see crawlers and pass through living bodies.
Non-biological unattached items remain physical. Crawlers can steal food from a ghost's hand, break buildings, redirect traffic, and be killed by moving vehicles. Interference changes the physical object's course while the ghost continues its original path.
Earth-memory loot turns to dust at floor collapse, preventing the crawlers from carrying modern military stockpiles into Faction Wars.
Translucent humans walking through solid movable objects in a fully physical city.
The rules make the historical environment both weapon and hazard without making its people interactive.