Crucible Year Peter Yuill
Two broad black curved bands, upper left and lower right, arc around a white centre over grey washes, with ink spatter along the right edge. T_271, tone-stretched: what the model was shownT_271: every pixel as the measuring code classes it
97 × 180 cm · the whole sheet, uncropped

T_271

The engine's reading

Two broad black arcs, one rising from the lower left and one falling from the upper right, swing around a pocket of white paper over grey wash.

Record
Date
2026.04.26
Dimensions
97 × 180 cm
Paper
Tanxi Thickened Grade A Half-Raw 6-Foot
Ink
Yi De Ge Refined Ink Juice, Boku-Undo Genso, Yi De Ge Yun Tou Yan
Enquire about T_271Availability, price or a studio visit. Peter replies himself; asking commits you to nothing.

Two black arcs facing each other round a pocket of white: a revolving door, seen from above, caught mid-turn. Theophilus Van Kannel patented the thing and called it a storm door, because it never lets the street all the way in. I like standing outside one in a busy lobby, watching the city sort itself into turns. Somebody pushes too hard and the panel ahead catches a stranger's heel. A courier goes round twice for fun. The spatter on the right is the rain they bring through on their coats, shaken onto the marble. In the middle the pale air turns over and over, a pocket of weather that belongs to the street and the lobby at once.

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
two curved dark bands, opposed, implying one circle around a pale centre
Movement
clockwise rotation on the diagonal; drips at right band's foot run against it
Coverage
ink on about four fifths of the paper
Tone
four tonal steps, weighted dark
Layering
grey washes then dark bands; readable at band edges and right band's foot
Edges
crisp on band walls; broken and dripping at right band's foot; soft in washes
Feibai
present along the upper rim of the left band
Open paper
shaped white lens at centre, between the arcs; leftover paper lower left
Chance marks
spatter at right edge and lower left; drips at right band's foot; creases in bands
Frame
ink runs off top, left and right edges; lower left stays open

Two black arcs face each other across a pocket of white paper, and the eye closes the circle they leave open. One climbs from the lower left, the other drops from the upper right, and the whole sheet turns clockwise around that pale centre.

The right band holds the most. Its curve follows the travel of the brush, and inside the black the hairs have left streaks and a darker inner arc, so the mass reads as one pulled stroke. Along the top of the left band, flying white splits the rim into fine parallel lines that keep the arc's direction. Beneath both, grey washes show at the edges, a lower step of tone for the black to stand on.

The costs are plain. The left band is an even mid-dark slab with little moving inside, and both bands stop in square, cut-off ends. The dense black lies flat enough to record every crease in the paper. Spatter crowds the right edge, and the drips at the right band's foot are clumsy.

The rotation is real and the right arc is a fine passage. The blunt ends, the flat left mass and the noisy margin keep this a sound, reliable sheet rather than a remarkable one.

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_271T_271, tone-stretchedT_271, classed by brightness
83%of the sheet carries ink
Black 48%Grey 38%Light 15% SHARE OF THE INK, NOT OF THE SHEET
TONAL STEPS

4 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: 0.051 (under 0.045 reads as flat).

0.300.751234 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, agreeing on 4 of 5 qualities.

Each quality placed on its ladder by each read, and the mean the engine keeps. Where reads differ, they differ by one rung; close calls resolve down.

READ 1READ 2READ 3READ 4READ 5MEAN
Form2BUILT2BUILT2BUILT2BUILT2BUILT2.0
Tonal depth2MODELLED2MODELLED2MODELLED2MODELLED2MODELLED2.0
Layering2LEGIBLE2LEGIBLE2LEGIBLE2LEGIBLE2LEGIBLE2.0
Composition2WORKING2WORKING2WORKING2WORKING2WORKING2.0
Material and surface1FLAWED2SOUND2SOUND2SOUND2SOUND1.8

READ 1, IN ITS OWN WORDS

“Two bold curved bands set up a circular movement over grey washes; forms coherent but blunt-ended, modest interior modelling, and visible creasing plus cloudy washes mar the surface. An ordinary sheet near R2.”

Form · BUILT

Two large curved bands hold their walls and follow an arc; ends are squared and slab-like, with bulk especially in the left band's cut-off end.

WEAKEST Blunt squared ends of left upper band

STRONGEST Right curved band following brush arc

Tonal depth · MODELLED

Tone-stretched view shows brush streaks and banding inside right band; left band shows a soft band but is largely even. Modulation 0.051 just above flat.

WEAKEST Left band interior fairly even mid-dark

STRONGEST Right band with streaked dry-brush grain

Layering · LEGIBLE

Grey washes and a pale arc sit under the two dark bands; overlaps readable at band edges, about two to three passes.

WEAKEST Lower-centre grey wash cloudy beneath right band

STRONGEST Translucent grey arcs under dark bands

Composition · WORKING

Opposed curved bands set up a circular diagonal movement with shaped white centre; right edge spatter and lower-left drips feel busy and scattered.

WEAKEST Crowded spatter field at right edge

STRONGEST Two opposed arcs implying a circle

Material and surface · FLAWED

Crease and crack lines visible in colour view across both dark bands; cloudy blotchy grey wash and water spots at lower centre and upper right.

WEAKEST Crackle creases through right dark band

STRONGEST Dry-brush streaks within right band

FLAWS

7 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 7 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 × OTHER“cracks in left dark band”2 × WATER STAIN, BLOOM“pale spotted washes upper right”3 × OTHER“crack lines in left dark band”3 × OTHER, WATER STAIN, RING · MAJOR“crease/crack lines through right dark band”2 × WATER STAIN“cloudy blotchy pale wash with spots, lower le…”1 × WATER STAIN“cloudy blotchy grey wash below left band”4 × OTHER“paper creases and cracks inside right dark ba…”WATER STAINBLOOMRINGOTHERMAJOR
GEOMETRY

Measured from the 16-bit master.

The previous engine (V22) measured this sheet's master file: 1 principal ink mass traced (cyan), 8 enclosed voids at true size in their grid cells (amber), the main gesture from start to end (red). Of 17 edge segments, 47% crisp, 29% soft or bloomed, 24% broken.

A1B1C1D1E1F1A2B2C2D2E2F2A3B3C3D3E3F3H1H2H3H4H5H6H7H8

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

2026.04.26, day 119 of the Crucible Year, one of 13 paintings from that date (10 shown). 55 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_271 among all 402

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

Every painting from 2026.04.26 · This date in the year

Materials

Paper
Tanxi Thickened Grade A Half-Raw 6-Foot, Anhui Jingxian Tanxi Xuan Paper Art Products Co., Ltd., made 2024
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)
When each paper was in use