Archicad Goodies
Downloading from open repositories can be risky. Poorly modeled "Goodies" can bloat your file size (polycount explosions) or corrupt your attribute lists with duplicate materials and fills. An unoptimized 3D tree object downloaded from a forum can turn a fast-moving BIM model into a slideshow.
While the official Graphisoft Add-ons are rigorously tested, "ArchiCAD Goodies" are often passion projects created by individuals. This leads to two significant downsides. archicad goodies
Allows you to link your model elements to a timeline, creating a 4D visualization of the building process. Downloading from open repositories can be risky
Facilitates the import and export of .3ds files, improving interoperability with other rendering and modeling software. archicad goodies