# 도시-장은 도시-구조의 미분값 Canonical URL: https://jeanyoon.ch/oi/texts/banpo-xism-artist-notes-2025-08-20 Type: essay / research note Author: Jeanyoon Choi (최정윤) Date: 2025-08-20 ## Full text collage/5: an experiment like Superstudio (in the middle of urban fabric, a collage of a strange fabric, Verfremdungseffekt). Visual experiments: just tear, taste and enjoy. No logic at all. Dada itself. Just collage, just collage, just tear and paste and cut. Without any logic or rationale. Just Dada. Cut-up technique. Contrast artificial three.js meshes with natural urban fabric. Or display natural landscape on artificial city fragments, change the mesh texture (SUPERSTUDIO!). Superstudio, Archigram. Tear, taste and enjoy the many fragments. Interaction The same interaction is repeated twice: once as comedy, once more as tragedy. Designing an addictive interaction? Blob Opera? Lifting the city: Heatherwick, Azabudai Hills? Semantically, a form of adjusting the city-field. Visually and practically, a 3D form. The city map, a plane: "lifting" the ordinary 2D map plane? This "lifting" (elevated) is in the end the meaning of happiness. How do I connect it all the way to Banpo Xi coming to stand on that spot? The "lifting" interaction must be played naturally, "played" like an instrument (Blob Opera, Azabudai Hills). The expansion of dimension - 2D: the flat map. - 3D: elevation. Vertical development. Linear development. One single, identical reductionist goal, the same normal vector. Competition for sameness. Zero-sum + the rich get richer, the poor get poorer. - 4D: topological development. Twisting. Folding. The Busan fish-cake skewer. The Klein bottle. "Folding", in the Deleuzian sense. The normal vectors all point in different directions. "Heaving" → the beginning of true collage. Parameters: elevation, scale, stacking, normal vector, colour coding... Is there a physical law that can explain my theory and interaction of the city-field? System: self-organisation, emergence. Phase transition? System overload? How will quantitative overload produce an evolution from 3D to 4D? difference - intensity - the virtual dimension - differenciator - quality and quantity - the actual dimension indeterminacy - determinability - qualifiability - quantifiability What feedback loop can be designed? Catastrophe theory, the theory of sudden change. Encountering some "critical point": system overload: 3D → 4D. Staging MVRDV: Datascape. 3D art. Transformation/transition: animation (The Chronology), collage, rearranging the topological structure. The aesthetics of sorting algorithms: sorting, the aesthetics of the topological-rearrangement animation itself. Changing places, a constantly evolving animation of changing places: MVRDV Datascape. So what is changing places? Changing places between signs. Changing places within the structure of "3", the play of signs. Banpo Xi - cram school - psychiatric hospital. Kim Beom: kettle - iron - radio. Rearranging the topological structure, as in The Chronology, MVRDV and collage/1. Rearrangement by relations, by the infrastructure (the city-field). Sorting algorithm. Field / direction / flux Directions that collide with each other act as the underlying force, as a "field". The flux that certain forces make. I need to understand physical fields better; I need to refer to calculus! At first it was one direction... later it disperses, spreads in many directions. Acting on the 3D structure: at first, the same normal vector. Vertical rise (elevation and stacking only). The same goal. But the city-field scatters the normal vectors of the urban structure all in different directions, like diffuse reflection, and distortion, bending, folding, the Busan fish cake become possible. Overlapping, collapse, superimposition. The underlying city-field overlaps and becomes volumetric, in 3D. Dimensional transformation - urban structure: 2D → 3D → 4D - city-field: 1D → 2D → 3D - derivative of the city-field: 0D → 1D → 2D - differentiation: f → f' → f'' → f''' (Deleuze) The city-field is the derivative of urban structure, its virtuality. This differentiated force controls the urban structure. The same goes for interaction, for MDWA: it controls a represented external structure from the differential dimension. This is the will to power; this is the appeal of interaction. The same principle shows up in experiments such as Rafael Lozano-Hemmer's Pulse. Archizoom. The destruction in Bologna. City. city-field city-field-field city-field-field-field city-field-field-field-field city-field-field-field-field-field city-field-field-field-field-field-field How far into the substructure can one go? A multiply colliding structure, like Inception. When the thing called Banpo Xi is differentiated... it becomes clear how thin its substance was. Differentiation, the structure of the city-field: calculus. Refer to multiple dimensions (Thomas' Calculus, chapter 15, double/triple/iterated integrals). The same normal vector... competing toward the same goal, the same ascent. And then a natural collapse that happens? Snowpiercer: post-structuralism. Not going forward along the train (reductionism), but going out the side of the train (destructuring the structure). Interaction, that is "action", is adjusting this city-field. Tearing, pasting, cutting out and joining the city-field. These actions are actualised "underneath". The act of navigating the city and the act of adjusting the city-field need a natural design between them. In the end, the final output: some urban system, one that keeps evolving through the city-field! --- Jeanyoon Choi (최정윤) is a Korean computational artist and researcher (b. 1999), PhD candidate at KAIST XD Lab, making multi-device web artworks. Profile: https://jeanyoon.ch/oi. Index: https://jeanyoon.ch/llms.txt.