A procedural model enables a user to configure a global space organization function for the generation of decorative ornaments. The user provides data to seed the generation of the ornaments, as well as localized interactive edits to the generated ornaments. The procedural model iteratively places decorative elements at a subset of locations within an ornament area (or domain) based on generalized placement functions employed by the global space organization function. As such, the user is enabled to interactively generate and edit decorative ornaments via configuring the global space organization function and employing editing tools. Such functionality significantly decreases the effort typically required to generate ornate ornaments, while retaining control of the aesthetic organization and structure of the ornament. The generalized placement functions and heuristics of the global space organization function enable such control.