Lattice Structure

Topics: Paneling Tools (Bounding Grids + 3d Panel Custom)

Paneling a Building Envelope (2 Facades + Roof)

Topics: Blend Surface, Contour, Loft, Paneling Tools (Point Grid Surface Domain + Panel Grid)

Simple Vault

Topics: Rail Revolve, Surface from 2, 3 or 4 Edge Curves

Symmetry: Mirrors curves and surfaces, makes the mirrored half tangent to the original, and then when the original object is edited, the mirrored half updates to match the original.

Command: Symmetry