NFT / Digital2021
Sliderverse × White Castle

Contents & work details
- Archive year
- 2021
- Type
- NFT / Digital
- Artist
- Che-Yu Wu 吳哲宇
- Commission
- White Castle’s hundredth anniversary (United States, founded 1921); licensing agency Brandgenuity
- Platform and contract
- Doodle Labs’ Art Blocks Engine contract 0x28f2…3240, project #1 (Ethereum, fully on chain); the first brand partnership on Art Blocks’ generative minting technology
- Editions
- 1,285 minted against a ceiling of 5,001; #0 to #1284
- Release
- Minting opened on 15 December 2021 with SLIDER-token redemptions for Family Mooks holders; public sale on 17 December at 0.1 ETH, 1,045 editions that day; the last on 7 October 2022
- Technology
- p5.js 1.0.0, fully on chain (a 134 KB script in eighteen chunks); one brush per ingredient and a physics simulation to stack the meal; a lo-fi beat synthesised in pure Web Audio; WebGL noise and halftone textures
- Keys
- Drag the sliders; click for a beat; space or double-click sends them all flying; S saves, T toggles the canvas texture, M toggles the music
- Charity
- A share of proceeds to the Ingram-White Castle Foundation’s team-member relief and scholarship funds
- Licence
- CC BY-NC 4.0; trademarks belong to White Castle
- Database
- The 1,285 hashes, trait shares and official renders
Overview
Someone online who was starting a company in New York messaged me out of the blue; we had a meal, and that was how it began: White Castle was turning a hundred and wanted a set of NFTs. What they had in mind was collages of illustrations, which looked like flyers; I proposed painting the burgers with mathematics, with the feel of a brush. Every ingredient is a brush of its own: bacon curls the way bacon does, the bun is thick and dotted with sesame, and each stroke starts with a random momentum and rotation, so no two burgers are alike; then, following the whole menu, fries, onion rings, chicken rings, shakes and sodas are added, and a physics simulation stacks them into a meal. The burgers also sing: each stroke is a note from a chord, each burger a track, and the kick, snare and hi-hat are synthesised live in the Web Audio API without a single sample, a lo-fi beat of its own for every edition. White Castle kept telling me the burger did not look like theirs, and I kept reshaping it.
It was torn apart. People who knew my earlier work saw burgers at the end and found it far too commercial, Andy Warhol’s soup cans. I still think it was ahead of its time technically: the whole work lives on chain, it was the first brand partnership built on Art Blocks’ generative minting technology, and on 17 December 2021, the day of the public sale, one thousand and forty-five editions were minted. I do not mind whether it is famous; what I mind is whether every piece of work tries something new.
- 01
hash
Sixty-four hex digits from the chain; the first sixteen become a seed for an xorshift generator
- 02
The menu
Colour theme, background, logo, slider count, doubles, side, drink and easter egg, drawn by weight
- 03
Each slider
Its own layers of bun, patty, cheese, bacon, egg, onion, pickle, veggie patty, chicken, waffle and fish
- 04
Brushes
One brush per layer: bacon curls, the bun is thick and sesame-dotted, every stroke starts with random momentum and spin
- 05
Stack it
A physics simulation stacks the layers and sides, then WebGL noise and halftone textures and a canvas weave go on top
- 06
Sing
A note per stroke, a track per slider; drums, beat length and reverb all from the same seed

0x31091dd13c80364d6dd140bce43d1f13e188b51e3d0c12b0f3e91687ac155b77- colour theme
- Classic84%
- background
- Solid35%
- logo
- Main94%
- sliders
- 222%
- double sliders
- 074%
- side
- none51%
- drink
- Red soda11%
- special
- none96%

0x73e1cb258d278e75335680ad00a2ebbcb00b5730251ff767f88b0460c3f2e2e6- colour theme
- Classic84%
- background
- Castle2%
- logo
- Main94%
- sliders
- 319%
- double sliders
- 074%
- side
- none51%
- drink
- none49%
- special
- none96%

0x6ee2b2997a21c50388527128d64008a4029fad382e35470685cd2f68687f1324- colour theme
- Vibrant16%
- background
- Birthday1%
- logo
- Birthday6%
- sliders
- 222%
- double sliders
- 120%
- side
- Chicken rings11%
- drink
- none49%
- special
- none96%

0x71f7ddf7b30155394094c91400c46a704c74c09533064c1cc724b4b8b7ebdc74- colour theme
- Vibrant16%
- background
- Comic9%
- logo
- Main94%
- sliders
- 100<1%
- double sliders
- 7<1%
- side
- none51%
- drink
- none<1%
- special
- none96%

0xbb0f48e02603b444f8d5a65fd7b5ab6752366269d9e569601560cf70931ee49a- colour theme
- Classic84%
- background
- Comic9%
- logo
- Main94%
- sliders
- 131%
- double sliders
- 120%
- side
- none51%
- drink
- Red soda11%
- special
- Hamily<1%

0x1563640de9404fcf4b205989578412b40cb7a38c4e41a797d03cf0b70addcb0a- colour theme
- Classic84%
- background
- Stripe15%
- logo
- Main94%
- sliders
- 131%
- double sliders
- 074%
- side
- Fries17%
- drink
- Orange soda13%
- special
- Pochi1%

0x0cce84b91d6a47b73b621f2efe48aeedb43f31c74377f845389e254df9745886- colour theme
- Classic84%
- background
- Solid35%
- logo
- Main94%
- sliders
- 319%
- double sliders
- 24%
- side
- Chicken rings11%
- drink
- Clear soda10%
- special
- Pixel1%

0x37182756c4605619eaf9b7b35970c0d60ff139c46ceff94fb931a42f63146383- colour theme
- Vibrant16%
- background
- Wave6%
- logo
- Main94%
- sliders
- 201%
- double sliders
- 120%
- side
- none51%
- drink
- none49%
- special
- none96%
A share is the count of that trait among the 1,285; the pictures are the official renders of the day.
Taking a burger apart into brushes
The proposal of 9 November 2021 says it plainly: take the burger apart into layers and materials, and give each layer a brush with its own physical character. The first simulation was a test of how the brush would look, and it came out too close to another burger chain’s, so we called an emergency meeting and changed it. Only after the layout was designed did the algorithm in the middle get built, and that part runs on experience: how to make p5.js feel organic and soft rather than hard and geometric. The whole pipeline grew out of the Electriz project on Art Blocks, the same pinned randomness and the same chunking tools, except that this script runs to eighteen chunks and 134 KB, with the White Castle logo and the birthday fireworks written on chain too.
One hash decides one meal: the Classic or the Vibrant brand palette, ten backgrounds (solid, stripe, grid, comic halftone, dot, wave, two brushes, the castle in twenty-three editions, the birthday in thirteen), one to a hundred sliders, a side, a drink, and four easter eggs: pixel, dot, nine editions hiding a Sea Ham robot, and fourteen whose fries grow Pochi faces.
Burgers that sing
The sound is generated entirely from data, without a single sample. The reference at proposal time was Brian Eno’s Music for Airports: each stroke is a note from a chord, each burger a track in the score. The on-chain build carries eight melody sets and three middle sections, four drum patterns, two snare and two hi-hat patterns, a beat length drawn between 0.15 and 0.3 seconds, and a reverb computed offline. A click on a burger triggers a beat, dragging gives it velocity, and the space bar sends every burger flying at once.
Making Soul Fish in August 2022 I said: choose a scale, reorder it, leave gaps, and it becomes a repeating melody, much as the burgers had done; Sliderverse and SoulSea were both attempts to synthesise sound in the Web Audio API.
Official renders of the day from the Doodle Labs content network (2,400 pixels square). Click to enlarge; every edition can be opened from the database page, with sound and draggable sliders.
- 01
9 November 2021
The proposal: layers and materials as brushes, generative sound design
- 02
29 November 2021
The repository opens: make hamburger obj, add some beats, play with cheese
- 03
9 December 2021
After Dinner Mints episode 29, still under wraps: “something about hamburgers”
- 04
15 December 2021
Minting opens with SLIDER redemptions for Family Mooks holders, 131 that day
- 05
16 December 2021
The PR Newswire release, picked up by Fox Business and Yahoo Finance
- 06
17 December 2021
Public sale at 0.1 ETH, 1,045 editions that day
- 07
7 October 2022
The last edition, #1284
- 08
July 2023
The Doodle Labs site is captured by the Wayback Machine for the last time, and stops answering after
- 09
September 2024
Fries, shakes and Sea Ham elements re-rendered on transparent ground for merchandise
- 10
20 September 2026
The on-chain script self-hosted, all 1,285 official renders kept, the database published
Original work record
Original text: the work introduction on the Doodle Labs site in 2023 (kept verbatim; the pre-launch version of 2021 ended “to find the intersection between food, art, and culture” and had no charity paragraph yet).
In honor of White Castle's 100th Birthday, renowned multimedia artist Che-Yu Wu has reimagined the White Castle menu through a generative art lens. Each unique edition within this series of collectible NFTs is generated by an algorithm at the time of mint, pushing the boundaries of physics, mathematics, and art. This series combines Che-Yu's signature, interactive style with White Castle's legendary sliders to explore the intersection between food, art, tech and culture.
And in keeping with White Castle's spirit of feeding the souls of their communities and team members, a portion of the proceeds from Sliderverse will directly benefit our Team Member Relief Fund and the Ingram-White Castle Team Member Scholarship.
- LiveThe on-chain script, self-hosted: a random edition each time, with sound
- DatabaseThe 1,285 database: hashes, traits, official renders
- PlatformEngine collection: Sliderverse by Che-Yu Wu x White Castle
- PlatformThe collection
- ArchiveThe original site sliderverse.doodlelabs.io (offline; snapshot)
- PR NEWSWIREPress releaseWhite Castle announces NFT collaboration with Doodle Labs and media artist Che-Yu Wu
- FOX BUSINESSPressWhite Castle introduces NFT art collection
- FilmThe White Castle segment of the meetup talk: starting from art, bent back by commerce (from 42:16)
- FilmAfter Dinner Mints episode 29: “something about hamburgers”, still under wraps (from 36:33)
- BeforeThe piece before it on the same pipeline: Electriz
- BeforeWhere the easter eggs come from: Pochi and Sea Ham
Notes are live things and our own pages, tags the platforms and records, clippings the press; every one opens.
Credits
- Artist: code, visuals, music
- Che-Yu Wu (p5.js 1.0.0, Web Audio, GLSL)
- Commission
- White Castle (centenary); licensing agency Brandgenuity
- Platform and release
- Doodle Labs (Art Blocks Engine contract, SLIDER redemption, public sale)
- Technology
- Art Blocks generative minting technology; one engineer on the render pipeline (December 2021)
- Charity
- The Ingram-White Castle Foundation: team-member relief and scholarship funds
- Self-hosting and database, 2026
- A byte-identical copy of the on-chain script with p5 1.0.0; all 1,285 official renders kept
Context & sources
Exhibitions, research & collaborations
Contact the artist


