Fix normals computation at the 'seam' of smoothed sphere and cylinder shapes
Fix normals computation at the 'seam' of smoothed sphere and cylinder shapes

(cherry picked from commit 509e03c82133ef55e33da25f13786d0b966945b6)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot