Create a Trapezoid Wall
The Trapezoid or Non-Parallel method allows you to draw straight Walls whose thickness is not constant.
When drawing a trapezoid Wall with a composite fill, only the last Core skin’s thickness reflects the trapezoidal shape of the Wall. In the image below, two of the skins are marked as Core, but only the Concrete Block core skin - the last Core skin listed in the dialog box - has a trapezoid shape.