Cache each environment candidate's world AABB once per evaluation and gate
the expensive per-voxel tests (Collider.ClosestPoint, ContainsWorld, concave
raycast) behind a cheap bounds.Contains prefilter. Collapses the hot loop
from O(voxel x colliders) worth of ClosestPoint/raycast calls to O(voxel x
few) for dense collider clusters (VHACD hulls, furniture), removing the
framedrop when overlapping many colliders. Conservative AABB test never
drops a real hit, so EmbeddedPercent is identical, just cheaper.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>