Editor's Note: In July 2010, this tip was updated with a new LISP file that has (vl-load-com) added at the beginning.
InsulBattPoly, submitted by Kent Cooper, allows you to create, or convert, an existing entity to a polyline representation of Batt insulation. Load the LISP code and type IB at the Command line. You will be prompted to select an existing entity, or create a new entity. Next, you are prompted to retain or delete this path. Then, you are prompted for the thickness of the batting and the justification of the batting along the path. Then the batting is constructed. If you want to adjust the results, simply repeat the command and choose Previous at the Select Path Type prompt. This will restore your entity and allow you to choose a new thickness and justification.