If you already have the "walls" of a post but it is hollow (missing top/bottom caps):
: In Edit Mode, hold Alt and click an edge of the open boundary.
: Press F to create a new face, sealing the volume to make it "manifold" (water-tight).
If you already have the "walls" of a post but it is hollow (missing top/bottom caps):
: In Edit Mode, hold Alt and click an edge of the open boundary. 124793
: Press F to create a new face, sealing the volume to make it "manifold" (water-tight). If you already have the "walls" of a