Crucible Year Peter Yuill
A huge dark ink loop sweeps across a beige sheet, black at lower left and upper right, enclosing a pale eye-shaped clearing at centre. T_231, tone-stretched: what the model was shownT_231: every pixel as the measuring code classes it
97 × 180 cm · the whole sheet, uncropped

T_231

The engine's reading

A single ink loop climbs from a black wedge at lower left, over a streaked arc, and back through grey, closing round a pale eye of paper.

Record
Date
2026.04.18
Dimensions
97 × 180 cm
Paper
Red Star Mo She Imitation Antique Chu Bark, Exhibition Edition, half-raw
Ink
Yi De Ge Refined Ink Juice, Boku-Undo Genso, Yi De Ge Yun Tou Yan
Enquire about T_231Availability, price or a studio visit. Peter replies himself; asking commits you to nothing.

The pale eye at the centre is the pitch, and the dark loop around it is the crowd, seen from the top of the stand where the cheap seats are. I go for the noise, not the game. Along the top the brush has run in long bright streaks, which is the wave going round, every row standing a moment after the one beside it, so the stadium looks like it is breathing. It always dies somewhere. Here it breaks at the dark knot on the right, where the home fans keep their arms folded on principle. Down at the left the black wedge is the tunnel mouth. The players are about to come out of it, and the pitch is still empty and lit, waiting for the first boot.

NeonWho Neon is
Detail at full resolution, cut by code where the brushwork is finest · select to enlarge
The engine's reading

The reading

Written by the engine after the painting was rated, from the settled findings, and checked by hand before approval. It explains the numbers; it may not change them.

Structure
one looping stroke, black wedge left, dark knot upper right, grey return below
Movement
circular, rising left to right across the top, returning low
Coverage
ink on about nine tenths of the paper
Tone
three tonal steps, weighted to the middle greys
Layering
pale grey ground, mid-grey loop, black overlays; readable in the upper half
Edges
crisp along the upper arc; soft and cloudy in the lower band; ragged at lower left
Feibai
present along the upper arc, streaking right into the dark knot
Open paper
eye-shaped clearing at centre, inside the loop
Chance marks
blooms through the lower grey band; spatter and drips at right edge
Frame
wash runs off top, left and right; lower corners partly open

One loop fills the paper. It rises from a black wedge at lower left, rolls over the top into a dark knot at upper right, and swings back underneath as a broad grey band, closing round a pale eye of bare paper. The circular drive reads at once.

The top of the loop is where the brush is most alive. Along that arc the hairs part into long streaks of flying white, all running the same way, and the tone steps down in bands into a knot that stays grainy instead of shutting. The half-sized paper keeps each pass where it fell, so the black lies cleanly over the grey beneath it at upper left.

Below, that clarity goes. Greys laid into damp greys have bloomed into round blotches, the order of passes is lost, and the walls of the return band dissolve into cloud. The black wedge is near-uniform inside, a slab with a ragged foot. Wash crowds almost every corner, so the eye finds little rest.

A typical sheet, then: an arc worth stopping for, a well-shaped clearing, and a loop whose lower half never firms up.

Measured

How it was read

Read by the Visual Analysis Engine, version 23.8, on 2026.10.06: measured by code, then read 5 times by Claude Opus 5.5 against three reference paintings (R1 to R3), each read independent of the others. How the engine works.

WHAT THE CODE SEES

Three views of one sheet.

Left, the photograph. Centre, the tone stretch the model is shown beside it: the darkest 45% of tones spread over the whole range, so flat black, banding and stains show. Right, every pixel as the measuring code classes it: cyan black ink, deep teal translucent grey, stone the palest ink, near black bare paper.

T_231T_231, tone-stretchedT_231, classed by brightness
90%of the sheet carries ink
Black 43%Grey 53% SHARE OF THE INK, NOT OF THE SHEET
TONAL STEPS

3 families of tone.

Every inked pixel's brightness in 64 bins, smoothed; each circled peak holds at least 4% of the ink. Life inside the black: 0.053 (under 0.045 reads as flat).

0.300.75123 BLACK INK TRANSLUCENT GREYS PALEST INK, 0.88 LUMINANCE OF EVERY INKED PIXEL, 64 BINS. PAPER (ABOVE 0.88) IS LEFT OUT.
FIVE READS

Five reads, one answer.

Each quality placed on its ladder by each read, and the mean the engine keeps.

READ 1READ 2READ 3READ 4READ 5MEAN
Form2BUILT2BUILT2BUILT2BUILT2BUILT2.0
Tonal depth2MODELLED2MODELLED2MODELLED2MODELLED2MODELLED2.0
Layering2LEGIBLE2LEGIBLE2LEGIBLE2LEGIBLE2LEGIBLE2.0
Composition2WORKING2WORKING2WORKING2WORKING2WORKING2.0
Material and surface1FLAWED1FLAWED1FLAWED1FLAWED1FLAWED1.0

READ 1, IN ITS OWN WORDS

“A confident looping arc with a good open centre and dry-brush texture at the top. The black diagonal is blunt and flat, the lower wash is cloudy and blotched, and near-total coverage crowds the sheet.”

Form · BUILT

Looping arc holds as one coherent form and the upper sweep follows the brush, but the left dark diagonal is bulky and blunt, and the lower arc's edges are soft.

WEAKEST Slab-like dark diagonal at left with ragged base

STRONGEST Upper arc sweeping right with dry-brush travel

Tonal depth · MODELLED

Upper arc shows banding and grain, and the right dark clump has stepped density. The left black diagonal is mostly uniform. Three tonal steps; modulation 0.053 is only modest.

WEAKEST Left dark diagonal mass largely flat inside

STRONGEST Upper arc banding and dry-brush streaks

Layering · LEGIBLE

Grey arc pass, black diagonal and dark right clump overlap legibly. Lower-arc passes merge into a mottled wash, and their order is hard to read.

WEAKEST Lower grey arc passes blur into cloudy wash

STRONGEST Black diagonal laid over grey arc, legible

Composition · WORKING

Clear circular movement around the central void, but 90% coverage leaves little shaped paper. The left and top corners are cluttered with scrappy wash.

WEAKEST Crowded corners; ink covers nearly the whole sheet

STRONGEST Open eye-shaped void at centre of loop

Material and surface · FLAWED

The lower arc wash is milky and mottled, with round blotches and soft rings visible in colour. Scattered drips sit at top right. The overall warm tint looks like discolouration.

WEAKEST Cloudy, blotchy lower grey arc

STRONGEST Dry-brush streaks along upper arc

FLAWS

6 distinct places, 1 major.

Each read must name every flaw and where it is, in a ninth of the sheet. Here the reads named flaws in 6 distinct places, 17 mentions in all across 5 reads; the number in each ninth is how many times a flaw was named there. Reads agreeing on a place strengthen the evidence for one flaw; they do not multiply it. A major flaw holds Material and surface at rung 1.

2 × TIDE LINE, WATER STAIN“faint pale edges in grey wash upper left”1 × OTHER“stray drips and spatter at right edge”4 × BLOOM, TIDE LINE, OTHER“spotted blooms around right dark knot”1 × WATER STAIN“cloudy pale patches inside lower-left wash”5 × BLOOM, WATER STAIN · MAJOR“mottled round blotches through lower grey arc”WHOLE SHEET · 4 × OTHERWATER STAINBLOOMTIDE LINEOTHERMAJOR
GEOMETRY

Measured from the 16-bit master.

The previous engine (V22) measured this sheet's master file: 1 principal ink mass traced (cyan), 7 enclosed voids at true size in their grid cells (amber), the main gesture from start to end (red). Of 13 edge segments, 23% crisp, 62% soft or bloomed, 15% broken.

A1B1C1D1E1F1A2B2C2D2E2F2A3B3C3D3E3F3H1H2H3H4H5H6H7

The rating these readings produce, the rules applied and the arithmetic, with Peter's own rating where he gave one, are in the Archive record.

Date

2026.04.18, day 111 of the Crucible Year, one of 12 paintings from that date (8 shown). 56 works were registered in the fourteen days before. Paintings are dated by the day their batch was registered and photographed; each was finished that day or within the few days before. Phase: P2 The Switch (working title).

THE YEAR

T_231 among all 402

Every painting of the year by date; this one is outlined.

Every painting from 2026.04.18 · This date in the year

Materials

Paper
Red Star Mo She Imitation Antique Chu Bark, Exhibition Edition, half-raw, China Xuan Paper Co., Ltd. (中国宣纸股份有限公司), made 2026.01.14
Ink MB4
Yi De Ge Refined Ink Juice, Yi De Ge (Beijing)
Ink MB5
Boku-Undo Genso, Boku-Undo
Ink MB6
Yi De Ge Yun Tou Yan, Yi De Ge (Beijing)
The sheet of paper was made 94 days before this painting.
When each paper was in use