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Hollow a solid with Shell

Shell hollows a solid out to an even wall thickness, leaving open the faces you pick — a box becomes a tray, a block becomes a casing.

Tool: Shell3 steps · 3 pictures

  1. Pick Shell in the Features group of the rail.

    Pick Shell in the Features group of the rail.

  2. Click the face to open — here the top. Every face you leave becomes a wall, and the preview shows the hollow at the default thickness.

    Click the face to open — here the top. Every face you leave becomes a wall, and the preview shows the hollow at the default thickness.

  3. Type the wall thickness, 30, in the box beside the face and press Enter. The solid is hollowed and a Shell step joins the timeline.

    Type the wall thickness, 30, in the box beside the face and press Enter. The solid is hollowed and a Shell step joins the timeline.

Good to know

  • Shift-click to open more than one face. At least one face must stay closed.
  • The Inwards switch in the tray chooses whether the walls are built inside the original faces or outside them.
  • Drag the handle beside the thickness box to set it by eye; letting go applies it.

Related

FeaturesRound edges with FilletFillet rounds the edges of a solid to a radius you set. Pick as many edges as you like and round them in one step. ModelingPush/Pull a facePush/Pull extrudes any flat face of a solid by a distance: raise a slab into a block, sink a pocket, or thicken a wall — and the solid stays a clean B-rep.

Recorded in Kozorosa by the help recorder, which checked that the result is in the model.