# Strawberry Cake Soft Body (WebGPU)

- Author: @ImaStudio_ai
- Card: Creator prompt
- Theme: Jelly & soft-body
- Stack: Not rebuilt
- Interaction: Drag
- Licence: Credited link (Shared publicly by the author; full text with credit, removed on request)
- Verified: not yet
- Original post: https://x.com/ImaStudio_ai/status/2104517586092458039

## Original prompt

```text
Build immediately a complete interactive WebGPU site called “Strawberry Cake.” 
Use genuine WebGPU + WGSL, procedural geometry, mouse/touch, and real-time volumetric soft-body physics. No Three.js/Babylon.js, Canvas2D, external assets, video/GIF, or CSS-only deformation.
Visual: premium Korean/Japanese strawberry shortcake—low, wide, rounded, pillow-soft, with pink sponge, cream layers, pale frosting, piped cream, and strawberries. Warm ivory background, soft studio light, edible moist materials.
Layout: top-left “SOFT STUDIES / NO.001” + italic “Strawberry Cake.” Top-right “WEBGPU · LIVE”. Large centered cake. Right controls: Hand/Knife, presets, Firmness, Damping, Drop, Reset, Pause, ¼ speed, Show mesh. Bottom-left: Mass, Volume, Kinetic, Pieces.
Physics: stable XPBD/co-rotational soft body with tetrahedral sim mesh, smooth render mesh, volume preservation, damping, gravity, floor friction, and piece collisions. Cake feels soft/heavy and wobbles after release.
Hand: hold=Press, inward drag=Squeeze, outward drag=Grab, fast release=Throw. Use weighted grabs, smoothed 3D target, pointer velocity and momentum. Cake remains free; cake input overrides orbit.
Knife: procedural 3D knife. Draw a cut line; animate contact→compression→penetration→breakthrough→lift. Deform before splitting; keep seam thin.
Repeated cutting is mandatory: use a dynamic pieces list; every piece stays cuttable. Convert strokes to vertical cut planes, split crossed pieces, create new soft-body/render meshes, transfer deformation/velocity, preserve toppings, keep halves aligned, update Pieces. Support 14+ pieces and multi-piece cuts. No fixed whole/left/right states.
Drop releases all pieces. Reset restores one intact cake and Pieces=1. Use fixed timestep/substeps, DPR≤2, clamp instability, avoid NaNs/GPU errors. Expose window.__cake.
Run locally, test interactions and repeated cutting, and iterate until polished.
```

Not rebuilt by 3dmotion yet. Credit stays with @ImaStudio_ai.

Prompt by @ImaStudio_ai (https://x.com/ImaStudio_ai/status/2104517586092458039) via 3dmotion.io/e/strawberry-cake-soft-body-webgpu