User re-gate after 2163308/987313a: run-from-town stairs FIXED, barrel
GONE - but the stairs still vanish by VIEWING ANGLE (visible climbing
down, gone climbing up; same at the tower top). The gate3 probe data
exonerates everything downstream: the entity always draws with correct
batches when it reaches the dispatcher (cache hit:119, restZ correct,
zero WALK-REJECTs, never clip-culled) - so the vanish lives in the one
gaze-dependent gate the probe cannot see: the bounds-based cullers.
WorldEntity.RefreshAabb was a fixed +-5 m box around the entity ANCHOR.
The staircase's 43 parts spiral 15 m ABOVE the anchor, and BOTH
visibility gates derive from the box: the dispatcher's per-entity
frustum cull AND RetailPViewRenderer.EntitySphere (the viewcone sphere
= this box's bounding sphere). Looking up the spiral put the anchor's
neighborhood out of view -> the whole entity culled while 15 m of it
stood in front of the camera; looking down kept the anchor in view ->
visible. Exactly the reported asymmetry.
Fix: expand the box by the largest MeshRef part-translation magnitude
(rotation-invariant, so entity.Rotation needs no handling; identity-
part entities get offset 0 - behavior unchanged; scenery scale is
already baked into the part transforms).
Suites: App 246+1skip / Core 1431+2skip / UI 420 / Net 294.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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