i'm Shpitzi, an industrial designer. every tool on this page exists because something i was actually making needed it — a speaker that had to fit a cabinet, a wall piece that had to earn its pattern, a printed part that needed the right lattice inside it. i build the tool, the tool builds the thing. they're free, they run in your browser, and you're welcome to them.
built for — a pair of speakers i'm building
speaker box designer. give it a driver and it tells you which enclosures suit it, why, and what to cut — with the excursion and port-velocity plots that decide it.
launch →built for — the LED wall piece hanging in my place
generative pixel studio for a wall-mounted LED piece. hunt seeds, design palettes, curate a collection — then publish it and the sculpture picks it up over WiFi. the pixel editor draws frame by frame: bring an animated gif, keep its own colours, and export a file the sculpture understands.
built for — feeding the sculpture geometry it couldn't draw on its own
3d geometry rendered as a grid of symbols. procedural creatures or your own .obj/.stl, lit and turned, then quantised into cells — and handed straight to the sculpture studio to preview.
launch →built for — casting concrete around a negative that leaves
Coeval Fossil and the seven tools that grew out of it — blocks, cells, kits, cad, a shape finder, the moulds and the sand itself — logged below like a drill core.
the family ↓built for — product films for the holsters and grips i design
one brief, ten models. write it once and it compiles into Seedance, Veo, Sora, Kling or Runway grammar — each vendor documents a different shape. pick a look and it fills the light, palette and texture in words you can edit, then tells you what will break before you spend a generation.
launch →there's always a project that needs a tool it doesn't have yet. that's where the next one comes from.
a family · casting
concrete poured around something built to leave. it began with Coeval Fossil: a printed lattice, cast into and kept. Fugitive Core turns it inside out — the negative is blocks you mould, pack and wash or break away, like a foundry's sand cores — and the core tools find the shapes, plan the kit, draw it the way a product is drawn, print the moulds the blocks are rammed in, and make the sand they are made of.
built for — fugitive core: a printed mould for every block the kit needs
core cad's pieces in, printable moulds out. drop in its stls or its zip and each piece gets a mould: two keyed halves split along its outline, or one part when it draws straight out. the sand goes in through an open face or a filling hole, chosen per piece; each half carries the piece's name and prints flat, without support.
built for — fugitive core: making the blocks' sand at home, from shop-shelf things
a bench checklist for water glass. drain cleaner and cat litter become sodium silicate; it weighs the batch for you, binds the sand, budgets the co₂ and stops you at the hazards. a kit list, a first-aid card and a batch log come with it.
built for — fugitive core: hunting for new space-filling shapes to cast
a node graph for finding space-filling polyhedra, grasshopper-style. wire surfaces, their extremes and the 36 cubic space groups into tilings; sweep a number and rank what turns up for casting; send a find to Core CAD as a unit. it rediscovered engel's 38-face record, proved exactly.
built for — fugitive core: designing a kit the way i design products
the planner as a cad tool, built the way solidworks works. a feature tree with rollback, relations that turn and place the surface and the lattice, parts you can edit, configurations, measure, outline and stl regions, a bottom layer of whole units resting on the floor, a cast view, step files of every mould — with a user guide and a marking guide built in.
built for — fugitive core: a kit you can actually build and pour into
a box, an outline or any stl, filled with units. the ones a minimal surface crosses are left out, and the gaps are the cast. a layer-by-layer plan with support flags, upright dowels, each mould's name debossed in its master, printable instructions and exact mould stls.
built for — fugitive core: which blocks a cast's negative should be made of
space-filling blocks for a minimal surface. cut the negative along the surface's own cells — one mould for fischer–koch — or build it from small cells and let the crossed ones be the cast. block types, mirror moulds, draft, walls in mm, release tests and exact stls.
built for — coeval fossil's next casts, poured around a negative that washes out
the negative of a pour, as blocks you can mould. a fischer–koch or split-p lattice cut into keyed blocks, each checked for undercuts — set by wall thickness or cast share, with layer plans, a block library and stls.
built for — printed parts that needed a lattice the slicer wouldn't give me
infill studio for 3d printing. design the lattice inside the part instead of letting the slicer pick it — minimal surfaces, cells that grow across the object, wall thickness in millimetres. stl in, stl out. where the family started: a 2023 design project, concrete cast into printed infill.
mouldprinted, keyed, in two halves or one infilla printed lattice, kept blockskeyed, moulded, washed or broken out cellsshapes that fill space alone layersa kit, bed by bed, doweled drawingfeatures, parts, step graphsearching for new shapes sandbound with water glass, set with co₂
nothing here is a demo. every tool got written because a thing i was making was stuck without it — and it stays as sharp as that job needed it to be.
every number comes with the reasoning attached — the tool teaches while you use it. a design decision you can't defend isn't finished.
i show work early to friends and people whose taste i trust, argue about the decisions, and change my mind in public. the tools are what's left over.
people i build with, and push each other to keep building. each one has a corner of this site that's theirs — their work, their words, their own look. none of it is mine, and that's the point.
small, self-contained tools for the things he makes — starting with a working guide to 48-hour cold-fermented neapolitan dough.
visit →a web app he built for his own use, hosted on his side and answering here. his description goes in once he's written it.
building something and want somewhere to put it? there's room. talk to me.
one build at a time — what got made, the decision behind it, the option i threw out and why, and the tool at the end of it. no noise, unsubscribe anytime.