V8.18.5

Fixes

• #566: Walking into a portal is more forgiving — oblique, off-center and edge approaches reliably trigger teleportation.
• #566: A player always exits a portal perpendicular to its surface at the speed they entered with, so aerial trajectories are predictable regardless of entry angle.
• #566: Players always land at the exact center of the destination portal, so two portals facing each other produce a stable aerial loop that repeats identically.
• #566: Horizontal air drag no longer slows the player down during the flight between two portals, preventing aerial loops from decaying over successive bounces.
• #566: Small variations in entry speed are smoothed so consecutive portal jumps in the same setup land at the same spot.
• #566: The camera no longer rotates when traversing face-to-face portal pairs (opposite walls, floor↔ceiling, or a mirrored 45° loop), keeping the view stable during aerial loops.
• #566: 45° portals rotate the camera like vertical walls, so the view never tilts along the slope.
• #566: Switching to creative or spectator flight mid-jump now correctly ends the portal-induced physics boost.