Replace -e w/-m mode select (surface, solid, box). Surface is default: outputs upper terrain surface; non-manifold. Solid outputs upper surface, plus bottom surface (displaced by base height) and walls. Box outputs upper surface, plus flat floor surface (at z 0) and walls.
Replace -e w/-m mode select (surface, solid, box).
Surface is default: outputs upper terrain surface; non-manifold.
Solid outputs upper surface, plus bottom surface (displaced by base height) and walls.
Box outputs upper surface, plus flat floor surface (at z 0) and walls.

anoved/phstl