TITLE Drawer 31 — Moths That Were Never Caught PROMPT A museum entomology drawer seen from above: a glass-topped wooden tray of pinned moths, every one procedurally generated and unique, with handwritten data labels beneath. Concept: generative natural history; a taxonomist's drawer for species that do not exist. The page should feel like leaning over a real specimen drawer. Mood: tender, studious, slightly dusty. Palette: drawer lining paper #EFE8D8 (aged, foxed at the corners), ink sepia-black #2B2118, moth browns and rusts #8C5A3C, tan #C8B48A, lichen green #6E7F5C, with rare accents permitted on individual moths only (a dusty rose #C97B84 underwing, a pale eyespot blue #7FA3B8). Wooden frame in darker walnut #4A3424. Brass fittings and a red TYPE border are the only other colours. Light page. Generation (Canvas 2D, seeded): each moth is drawn on one side and mirrored for perfect bilateral symmetry, then given tiny asymmetric wear (a nick in a wing edge, a missing antenna tip) so it looks real. Forewing and hindwing outlines come from parametric curves with per-species parameters (aspect, apex pointedness, scalloped or smooth margin, tails on some hindwings); wing patterns are layered in order: base gradient, noise mottling, transverse bands that follow curves across the wing (antemedial, postmedial lines), a discal spot or a full eyespot with concentric rings and a highlight, veins as thin lines radiating from the wing base, a fringe of tiny hair strokes on the margin; bodies are furry (short radial strokes) with segmented abdomens; antennae either feathery (pectinate) or thread-like. Five families of body plan so the drawer has variety: hawk-moth-like with narrow swept wings, emperor-like with big eyespots, geometer-like thin and angular, stout owlet-like moths with kidney marks and bordered hindwings, and tiny micro-moths with long fringes. Each specimen has a pin (steel head with a specular dot) through the thorax and casts a soft shadow offset on the paper, larger for larger moths. Layout: a grid of 24 specimens on desktop (16 at tablet widths, 12 on phones, in fewer columns) arranged in four neat rows grouped under invented genus header labels, the pins of each row aligned on one line, each with a small rectangular label pinned beneath in handwriting-like italic (Georgia/"Palatino" italic, slightly rotated, ink of uneven darkness): invented binomial names generated from Latin-ish syllable sets ("Noctua vesperalis", "Selenia umbrata Hollis, 1887"), locality and date in tiny script ("Fenwick Carr, at light, 14.vi.1902"), and a red-bordered TYPE label on one specimen. The drawer has a brass label holder on the front: "Drawer 31 · HETEROCERA · Coll. E. M. Hollis". Beside the tray (below it on small screens), sparse museum text in small caps, a very large drawer numeral, a short curatorial note about E. M. Hollis and a tally of specimens, genera and types. Signature moments: (1) on load, the drawer slides open from under the cabinet rail at the top with a wooden ease and a small settling bump, and the moths are "set" one by one in quick succession (each pops in with its shadow, 35ms stagger); (2) hover or tap a moth and it lifts toward the viewer under a round brass-rimmed magnifier that follows the pointer across the specimen: a large crisp re-render at 3× with full pattern detail, while a typed catalogue card slides out beside it (wingspan in mm, flight season, locality, and an invented one-line observation typed out character by character: "Comes to sugar. Sits with wings tented, like a small roof."); (3) one moth in each drawer is not dead: now and then its wings quiver on the pin, a first click makes it stir and adds a note to its card, and when clicked a second time it detaches, flutters erratically across the page with a flapping animation, and settles somewhere else, leaving an empty pin and its label behind. Disturbing it where it rests sends it off again. Controls: a "Next drawer" brass cup pull on the drawer front that closes this drawer and opens a newly generated one (new seed, new species, drawer number increments); a small brass toggle "undersides" that flips every specimen with a card-turn to show paler, mirrored ventral patterns. Keyboard navigation between specimens with arrow keys and visible focus; N and U as shortcuts. Reduced motion: no fluttering or staggered setting; the magnifier appears without animation. DESCRIPTION A walnut specimen drawer slides out from under a cabinet rail and fills, moth by moth, with two dozen species that never existed: emperors with ringed eyespots, swept hawk-moths with rose underwings, angular lichen-green geometers, stout owlets and tiny fringed micros, each painted procedurally from a seed, mirrored for symmetry and then slightly damaged the way real specimens are. Rows are grouped under printed genus headers, every pin in a row sits on one line, and beneath each moth is a small tilted label in uneven sepia handwriting. The lining paper is foxed at the corners, the glass carries a faint moving reflection, and the drawer front holds a brass label holder, a cup pull and a small brass switch. To one side a huge Didot numeral and a dry curatorial note explain the collection of E. M. Hollis, who pinned the moths he was sure of and never caught. The experience is quiet and studious: pass a brass magnifier over a specimen to read its scales at three times life size while its typed index card slides out, turn the whole drawer over to see the pale undersides, pull the next drawer, and eventually discover that one specimen in each drawer is still alive. VISUAL TECHNIQUES - Seeded procedural moth generation on Canvas 2D with five body-plan families and per-genus, per-species parameters - Parametric wing outlines (quadratic margins with scallops, angular points, tails and hooked apices) and a wing-space (u,v) coordinate system so bands, veins, mottling and fringes follow the wing's own curvature - Layered wing painting: radial base gradient, median shading, scale-stroke mottling, wavy and dentate transverse bands with pale companions, kidney marks, discal dots and concentric eyespots with highlights, radiating veins, hair fringe - One side drawn and mirrored with a reseeded generator for exact bilateral symmetry, then asymmetric wear cut in with destination-out compositing and truncated antennae - Furry thorax and segmented abdomen built from batched radial strokes; pectinate or thread-like antennae along a Bézier - Shadows baked per specimen and scaled with wingspan; CSS-drawn steel pin heads with specular dots - Resolution-independent 3× re-render with extra detail, cached offscreen and panned beneath a conic-gradient brass rim with masked ring, glass highlights and a turned handle - Walnut grain, paper fibre and page grain from inline SVG turbulence; procedurally scattered foxing as stacked radial gradients; mitred frame corners via clip-path - Glass reflection streaks that drift with the pointer - Web Animations choreography: drawer slide with settling overshoot, 35ms staggered setting-in, two-stage card-turn flip with perspective - Index-card catalogue with ruled lines, red header rule, punched hole and typewriter text reveal - Steering-noise flight simulation with flapping wing foreshortening, heading-aligned body and an altitude shadow - Typographic system of Didot/Bodoni numerals, Baskerville italics, letterspaced small caps, Georgia italic handwriting with per-word ink opacity, and Courier typing INTERACTION MODEL Hovering a specimen with a mouse lifts it slightly and brings a brass magnifier over it; the lens follows the pointer across the moth and shows a 3× re-render of whatever is beneath it, while a typed catalogue card slides out on the free side with wingspan, flight months, locality and an observation that types itself. On touch, tapping a specimen centres the lens on it and raises the card as a sheet above or below; tapping it again or anywhere else puts the glass away. Tab enters the drawer, arrow keys (and Home/End) move between specimens with a dashed focus outline and the lens follows focus; Escape closes it. One specimen per drawer is alive: it occasionally quivers by itself, the first click or Enter makes it stir and appends a red note to its card, and the second sends it fluttering erratically across the page to settle somewhere else, leaving an empty pin and label; the resting moth can be clicked or activated from the keyboard to make it fly again. The brass "Undersides" switch (or U) turns every specimen over in a staggered card-turn to show paler mirrored ventral patterns, which the magnifier then also shows. The brass "Next drawer" pull (or N) slides the drawer shut and opens a freshly generated one with the next drawer number, new genera, names, labels, type specimen and living moth. The layout regenerates for 6, 4 or 3 columns as the window changes. With reduced motion the drawer and specimens appear at once, the lens and card appear without animation, text is not typed, and the living moth simply changes place.