۲D solids are filled only when the FILLMODE system variable is on (1) and the viewing
direction is orthogonal to the 2D solid.

The following prompts are displayed.

First point

Sets the first point in the 2D solid.

Second point

Sets the first edge of the 2D solid.

Third point

Sets the corner that is opposite the second point.

Fourth point

The fourth point is diagonally opposite the first point. Pressing Enter at the Fourth
Point prompt creates a filled triangle. Specifying a fifth point creates a quadrilateral
area.

Specifying successive third and fourth points creates further connected triangles
and four-sided polygons in a single solid object.

Exit

Ends the command.