The CSpeedTreeRT stand-in now returns the collision objects stored in
the .spt (12000 section: spheres and cylinders) instead of one fixed trunk
cylinder, and takes leaf texture rects from the 10000 section instead of
hand-picked atlas rects (trees without leaf maps use the frond rect).
SpeedGrass/BoundaryShapeManager are N_A (no 40250 caller).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
