Riso still

Deliver prints/<name>/index.html and a native PNG in out/. Same medium as the films: Canvas 2D only, no libraries, fonts, images or network calls. External references are observation sources, never embedded assets. If the user explicitly wants generated raster imagery, that is a different workflow; do not quietly substitute it. Commands run in tools/.

Develop the picture

Read .claude/rules/riso-plates.md, docs/visual-development.md and docs/drawing.md (its composition and frame-budget sections apply in full); add docs/scene-space.md when perspective or attached details matter and docs/characters.md for figures. Skip film timelines, transitions and sound. examples.md maps the shipped series (prints/cabinet, prints/sceneries, prints/workings); open the matching source before inventing a routine it already has.

Extract subject, feeling, format and exclusions. If the user wants ideas, offer different scenes or viewpoints; if they want art, choose and draw. Default to 1080 square only when no format was given; record other sizes before composing.

• An open request ("a collection", "detailed sceneries", "your strengths") is permission to art-direct a series of three to five prints under one principle stated up front: one construction style held across different subjects (prints/cabinet), or one technical strength per print (prints/sceneries: constructed perspective with fog, lights with reflection, strata with layered haze).
• For an unfamiliar subject, look at real references and note proportions, gesture, construction and material; measure in the photo's own pixel frame where it matters (wing outline, vein and eyespot positions). A mood adjective or an unopened image link is not enough.
• For ambitious work, compare small compositions with different viewpoints and value groupings, then develop the strongest. A local edit needs less setup.
• Solve support, perspective, occlusion and identity before detail. Draw figure landmarks and contact points before clothing or texture: the hand reaches the tool, the tool meets the work. Build details on shared surfaces so ellipses, slats and legs agree on orientation and scale. Grow natural subjects from their own geometry (a logarithmic spiral, Vogel's floret model, a distance transform from a cavity wall), so every mark sits where growth put it.
• A film's 0.25 s reading time does not govern a still: sustained detail is allowed, but marks should explain form, material or the moment. Concentrate detail at the focus and leave quiet areas. Random hatching and misregistration do not rescue weak drawing.

Build and inspect

node new-riso.mjs --kind still --out ../prints/<name>/index.html
node verify.mjs ../prints/<name>/index.html --times 0,1,2
node still.mjs ../prints/<name>/index.html --at 0 --out ../out/<name>.png

The starter is blank paper with the print and craft kits and no animation loop. Draw in its art block. A single picture uses duration: 1 and a seek(t) that draws the same picture; a series uses integer print indices (floor(t), as prints/workings does), verified at every index and exported one PNG per index. No MP4, score or artificial motion.

For another native size, change canvas, paper, plate dimensions, projection and screen pitch before baking, and audit square assumptions like W,W. Larger prints must rerasterize geometry and screens at that size; CSS/DPR enlargement and PNG upscaling do not make a higher-resolution original. Press-ready separations need a separate print-production brief.

• 2160 square (OUT = 2160, K = OUT / W) served both Cabinet and Sceneries. PITCH = 4.6 * K (9.2 device px) is the same picture enlarged, right for landscape masses; small dense subjects took a finer 3.4 * K (6.8 px). Registration scales with K.
• Fine engraved line needs coverage 1 to print solid; the kit's threshold tile leaves the interstices open even at full coverage (right for film tone), which breaks thin line into dots.
• A feature under a few screen cells (florets, scales, birds) is modelled by shape and solid overprint, not dot size. A small fixed dither on mid-tones breaks remaining dot-size steps in a gentle ramp; leave paper and solids untouched. At 2160, centre the screen's dots on pixels (docs/drawing.md, tone that prints) or ramps contour into rings.
• Add debug views by query string before polishing: construction lines alone compared against the reference diagram (it caught over-curved septa in a shell section), and one ink at a time for plate isolation.

Inspect the whole picture at viewing size, a value/silhouette view, and 1:1 crops of difficult anatomy, attachments and screen. Fix perspective, tangencies, missing support or an unclear subject before polishing grain; docs/quality-bar.md lists the review cases. still.mjs exports the canvas backing store and checks repeatability; it does not judge the art. Confirm dimensions and open the PNG.

Keep a short PRINT.md beside substantial work: request, the series principle, references per print, viewpoint, geometry and light decisions, native size and pitch, inspected output and each print's remaining weaknesses. Keep the previous version when revising.