Crucible Year Peter Yuill
A broad grey brushstroke arcs left to right over a white oval, ending in a black tip at right; grey wash and black blots crowd the left. T_183, tone-stretched: what the model was shownT_183: every pixel as the measuring code classes it
97 × 180 cm · the whole sheet, uncropped

T_183

The engine's reading

A broad grey arc rises from a clouded left mass, swings over the top of the paper, and comes down in a black tip around a rounded white.

Record
Date
2026.04.08
Dimensions
97 × 180 cm
Paper
Red Star Mo She Special Effect Xieyi Edition, raw
Ink
Kuretake Shogei Kiwami, Yi De Ge Zhonghua, Boku-Undo Bokkou
Enquire about T_183Availability, price or a studio visit. Peter replies himself; asking commits you to nothing.

Find the black at the far right, and the small pale hole in it. That is a lit window. Every tower in this city has one at four in the morning: somebody's kitchen, somebody's insomnia, a lamp left on for a cat. The whole night swings around it, the elevated track bending over the roofs, the steam off the vents, the market on the west side spilling crates and puddles into the street. Whoever is in that window is not looking out. They are reading the back of a cereal box, or deciding whether to call. I give them the skyline. The train goes round the bend, the puddles fill with rings, and the window stays on, small and stubborn, burning a hole in the dark it lives in.

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 great arc joined to a clotted left mass by a shared grey sweep
Movement
clockwise, left to right and down; lower-left strokes slant against it
Coverage
ink on about three fifths of the paper
Tone
five tonal steps, weighted to the middle greys
Layering
grey wash, black loaded strokes, spatter; readable along the arc, clouded at left
Edges
crisp on the arc's inner rim; soft on black lobes; broken at left
Feibai
present along the upper rim of the arc, top right
Open paper
rounded white oval inside the arc, centre right, open below
Chance marks
spatter upper and lower left; ringed drops in left wash; drops bottom right
Frame
ink and spatter reach the left edge; top, right and bottom right stay open

One grey arc sets the whole sheet moving. It rises out of a clouded mass at the left, travels over the top of the sheet and comes down hard at the right in a dark, tapered tip, closing a rounded white at its centre. The eye goes clockwise and lands in that white.

The upper rim of the arc is the best passage on the paper. Raw bark paper grips a fast, dry brush, and the hairs have split into parallel streaks of bare paper that hold the curve to the end. Just below, a dark band lies over translucent grey, and the order of the passes reads plainly.

The left half pays for it. Black lobes sit there as bulky blots. The grey wash is pocked with ringed drops where water dried at its edges on the raw paper, and spatter crowds the margin until the passes cloud together. At the right, the black tip is flat inside, with a small bleached hole near its end.

That leaves a good arc with a heavy, unsettled half attached. Plain, uneven work.

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_183T_183, tone-stretchedT_183, classed by brightness
58%of the sheet carries ink
Black 23%Grey 55%Light 22% SHARE OF THE INK, NOT OF THE SHEET
TONAL STEPS

5 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: 0.044 (under 0.045 reads as flat).

0.300.7512345 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

“Gestural sweeping arc around a strong white void, close to R2. The left mass is clotted and pocked with ringed drops, and the darks are mostly flat inside. Ordinary sheet with a material weakness.”

Form · BUILT

The big right arc follows the brush's travel and tapers cleanly. The left mass is clotted, with blobby dark lobes, and the bottom-centre dark lump is bulky.

WEAKEST Bottom-centre dark blob and left-edge clotted patches

STRONGEST Right sweeping arc ending in tapered dark tip

Tonal depth · MODELLED

The left grey field has grain and veining, and the top-right dark band shows banding. The right-tip and bottom darks are flat inside; modulation is 0.044, below the flat threshold.

WEAKEST Right arc dark terminus is flat inside

STRONGEST Left grey mass with grain, veining and stepped density

Layering · LEGIBLE

The translucent grey arc pass shows under the dark strokes, top right, and the order can be read. On the left, the passes clot together and are less legible.

WEAKEST Left mass where darks clot into the grey

STRONGEST Dark band laid over translucent grey arc, top right

Composition · WORKING

The large arc carries the eye from left to right around a shaped white void in the centre. The left third is crowded and busy with spatter; the bottom-right drops are a weak afterthought.

WEAKEST Crowded, spattered left third

STRONGEST Sweeping arc enclosing a shaped white void

Material and surface · FLAWED

The left grey wash carries many ringed, tide-edged drops and pocks beside the principal masses, plainly visible in the colour view. There is also a white void in the right dark tip.

WEAKEST Ringed drops and pocked spots in left grey wash

STRONGEST Dry-brush streaking along top of arc

FLAWS

5 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 5 distinct places, 20 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.

7 × RING, BLOOM, WATER STAIN, OTHER · MAJOR“ringed drops and pocks in the left grey wash”5 × RING“small ringed drops near the central white voi…”4 × OTHER“white hole inside the dark tip of the right a…”3 × WATER STAIN, RING“ringed blots at the bottom-left edge”1 × OTHER“stray blots in white space, lower right”WATER STAINBLOOMRINGOTHERMAJOR
GEOMETRY

Measured from the 16-bit master.

The previous engine (V22) measured this sheet's master file: 4 principal ink masses traced (cyan), 5 enclosed voids at true size in their grid cells (amber), the main gesture from start to end (red). Of 21 edge segments, 76% crisp, 19% soft or bloomed, 5% broken.

A1B1C1D1E1F1A2B2C2D2E2F2A3B3C3D3E3F3H1H2H3H4H5

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

2026.04.08, day 101 of the Crucible Year, one of 22 paintings from that date (11 shown). 37 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: P1 Warm-up (working title).

THE YEAR

T_183 among all 402

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

Every painting from 2026.04.08 · This date in the year

Materials

Paper
Red Star Mo She Special Effect Xieyi Edition, raw, China Xuan Paper Co., Ltd., made 2025.12.08
Ink MB1
Kuretake Shogei Kiwami, Kuretake
Ink MB2
Yi De Ge Zhonghua, Yi De Ge (Beijing)
Ink MB3
Boku-Undo Bokkou, Boku-Undo
The sheet of paper was made 121 days before this painting.
When each paper was in use