Zellige is one of Morocco's oldest geometric crafts. Artisans use hammers to chisel precise polygonal fragments from glazed tiles, assembling them into endlessly extending star-and-grid compositions. This geometric grammar has been transmitted across centuries, with each generation of maâlem (master craftsmen) working within established rules, occasionally introducing small deformations at the margins. Jawhar Kodadi — an architect trained at the National School of Architecture in Rabat — has moved this geometric grammar from the workshop into Grasshopper and p5.js. He has done something that appears simple but is structurally profound: he lets zellige's rules run on their own.

Kodadi's "Zellige EVO" series uses Grasshopper/Rhino's parametric environment to simulate zellige's generative logic. Hexagonal bases repeat on a grid; a dynamic function modulates the size of each base shape. This is not a digital reproduction of traditional patterns — that would merely transfer construct to the screen. This is letting zellige's geometric rules evolve within an algorithmic environment, producing variations that human craftsmen would never make but that grow legitimately from the same underlying logic. Those variations are the remainder: they overflow from the traditional chisel-construct cycle, the surplus product of rules operating in a new medium. Crucially, Kodadi has turned these tools into free browser applications. His Moroccan Zellige Pattern Generator and Zellige Creator let anyone manipulate zellige's geometric parameters in the browser, watching patterns grow on screen in real time. The tool itself becomes an aesthetic object — it is not the final work, but it is the site where remainder is continuously produced.

From the SAE perspective, what makes Kodadi's work beauty-of-the-remainder rather than beauty-of-the-construct is precisely this: zellige as a craft tradition is already-construct. Centuries of chisel-construct cycles have polished it into a recognizable, fully named beauty. But when zellige's geometric code is translated into parametric code, a new remainder-space opens. The algorithm can explore variations that the craftsman's hands would never reach — not because the craftsman lacks skill, but because physical operation on material naturally constrains the possibility space. Code lifts that constraint, and zellige's rules run across a larger territory, producing shapes that have no name. These shapes are neither "traditional zellige" nor "generative art" — they exist in the gap between both domains, not yet fully claimed by either. This is exactly where the beauty of the remainder lives.

Seeing Kodadi's work now matters more than seeing it later. The intersection of parametric design and traditional craft is being slowly approached by architecture and design, but no one has yet given it a complete aesthetic framework. Once it is named — once "generative zellige" or "parametric Islamic geometry" becomes a stable category — it becomes construct. Right now, it is still remainder. Kodadi works from inside the tradition (he is a Moroccan architect, not an outsider "sampling" exotic patterns), using open-source tools to invite everyone into this geometric remainder-space. This is not cultural appropriation; it is the natural overflow of cultural rules into a new medium. The remainder never asks for permission.

Han Qin (秦汉) · @hqinjarsy · SAE Judgment & Aesthetics