Crucible Year Peter Yuill
A wide grey brushstroke dips in a U across white paper, between a splattered black mass at left and a rising black crescent at right. T_249, tone-stretched: what the model was shownT_249: every pixel as the measuring code classes it
70 × 180 cm · the whole sheet, uncropped

T_249

The engine's reading

A long grey arc swings across the paper from a splattered black knot at left to a black crescent rising at right, under wide empty paper.

Record
Date
2026.04.21
Dimensions
70 × 180 cm
Paper
Tanxi Thickened Grade A Special Jing Pi Small 6-Foot (raw)
Ink
Yi De Ge Refined Ink Juice, Boku-Undo Genso, Yi De Ge Yun Tou Yan
Enquire about T_249Availability, price or a studio visit. Peter replies himself; asking commits you to nothing.

That little hook high on the grey back is the one Thor baited with an ox's head, rowing out farther than the giant Hymir dared, to fish for the serpent that lies coiled round the whole world. The long grey sweep is the serpent coming up. Snorri tells it plainly: Thor hauled so hard his feet went through the boat and stood on the sea floor, and the serpent rose spitting venom and met his eye. Then Hymir, terrified, cut the line. I am on Hymir's side. The world needs its serpent more than Thor needs a trophy. The black at the left is the sea still churning where the head went down, and the spray hangs over the empty sky, dark drops that have not yet decided to fall.

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
left dark cluster, grey U-sweep, central dark wedge, right crescent, all joined by the arc
Movement
left to right along a dipping arc, lifting at right; central wedge sits against it
Coverage
ink on about two thirds of the paper
Tone
five tonal steps, spread across the range
Layering
pale grey, mid-grey and black passes; readable at right and centre, fused at left
Edges
crisp on crescent and wedge; soft along grey wash; broken in left splatter
Feibai
present in the rising right crescent and the streaked grey arcs at upper left
Open paper
broad bowl at top centre, shaped by the arc's curve
Chance marks
spatter at left and upper right; milky streaks in wedge; cloudy halo by left mass
Frame
ink runs off left, right and both top corners; top centre open; bottom grazed at centre

A long grey sweep drops from the upper left, bottoms out under the middle and climbs again at the right, where a black crescent lifts it to the top edge. The whole sheet is that one swing, and the broad empty paper above takes its shape from the curve.

The right end is where the painting is surest. On raw paper that drinks fast, a translucent grey arc went down first and stayed open. The dark crescent rides over it without sinking, and the brush hairs part into feibai as the stroke rises. The central swath keeps its grain and banding, so the brush's travel is still in the grey.

The left end is crowded. Splatter, lobed blots and stacked passes knot into a dark mass whose walls dissolve, inside a cloudy halo where wet wash spread. The central wedge is blunt, nearly flat black, streaked with pale milky marks, and it stops the swing instead of riding it.

A well-made sheet with a clear spine and one finished passage. The knot where it begins is why it stops at good.

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_249T_249, tone-stretchedT_249, classed by brightness
69%of the sheet carries ink
Black 42%Grey 45%Light 13% 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: 0.061 (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 surface2SOUND2SOUND2SOUND2SOUND2SOUND2.0

READ 1, IN ITS OWN WORDS

“Gestural sweeping arc with a busy splattered left mass, a blunt centre wedge and a fluent right crescent. The movement is good, but the left side is crowded and some darks are flat. An ordinary sheet near R2.”

Form · BUILT

Right crescent and long grey sweep follow brush travel; centre wedge is blunt; left mass is a lobed splash with weak walls.

WEAKEST Left dark mass, splattered and lobed, edges dissolve

STRONGEST Right crescent stroke sweeping upward

Tonal depth · MODELLED

Five tonal steps; grey band shows striation and grading; left mass mottled; centre wedge and lower right dark fairly uniform inside.

WEAKEST Centre dark wedge, largely flat interior

STRONGEST Grey sweep with brush striation and graded density

Layering · LEGIBLE

Pale grey arc pass under darker strokes stays readable at right and centre; left cluster overlaps less clearly ordered.

WEAKEST Left area where dark splashes clot over greys

STRONGEST Dark crescent laid over translucent grey arc at right

Composition · WORKING

Long arc carries eye across sheet; upper empty paper shaped by the curve; left quarter crowded and congested with splatter.

WEAKEST Crowded, busy left cluster

STRONGEST Continuous swooping arc from left to upper right

Material and surface · SOUND

Ink controlled overall; slightly milky cloudy grey around left mass and pale patch beside it; no tide lines in principal darks.

WEAKEST Cloudy grey wash halo around left mass

STRONGEST Dry-brush striation inside right crescent and grey sweep

FLAWS

4 distinct places, 0 major.

Each read must name every flaw and where it is, in a ninth of the sheet. Here the reads named flaws in 4 distinct places, 9 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.

1 × OTHER“stray ink dots in empty upper-centre paper”1 × OTHER“stray ink drops scattered in the empty upper …”5 × WATER STAIN, BLOOM“Cloudy pale grey wash around left dark mass”2 × OTHER“pale milky streaks inside centre dark wedge”WATER STAINBLOOMOTHER
GEOMETRY

Measured from the 16-bit master.

The previous engine (V22) measured this sheet's master file: 1 principal ink mass traced (cyan), 5 enclosed voids at true size in their grid cells (amber), the main gesture from start to end (red). Of 16 edge segments, 25% crisp, 63% soft or bloomed, 13% 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

2026.04.21, day 114 of the Crucible Year, one of 14 paintings from that date (10 shown). 63 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_249 among all 402

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

Every painting from 2026.04.21 · This date in the year

Materials

Paper
Tanxi Thickened Grade A Special Jing Pi Small 6-Foot (raw), Anhui Jingxian Tanxi Xuan Paper Art Products Co., Ltd., made 2015.11.19
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 3806 days before this painting.
When each paper was in use