The shell tool is the tool of choice if you want to make walls for a house or if you want to create a solid object out of a plain surface. The images below demonstrate how a simple polygon structure was turned into a realistic wall structure quickly and easily using the Shell Tool.

Modes
The shell tool can only be applied to raw polygon objects. It's only available in polygon mode.

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  To use the shell tool, select some polygons of a raw polygon object. Then choose the shell tool and drag the mouse in the 3D view either to the left or right, depending on whether you want to perform a negative or a positive shell. Once you are finished release the mouse button.

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Properties

• Inside: This property decides if the shell is moved along the normal direction (outside) or against the normal direction (inside).
• Angle: Determines which polygon neighbors of a polygon selection belong to a shell. Bigger values allow more polygons too be grouped too a shell.
• Quantize: Set this property to 0 if you want to adjust continuously, otherwise this value determines the distance you want to quantize the shell to.