Crucible Year Peter Yuill
A huge black fan-shaped arc with violet and grey fringes spans pale paper, a black block at top, a black slab lower left. T_417, tone-stretched: what the model was shownT_417: every pixel as the measuring code classes it
97 × 180 cm · the whole sheet, uncropped

T_417

The engine's reading

A great black fan swings across pale paper on a violet rim, with a block laid over its crown and a black slab in the lower corner.

Record
Date
2026.11.03
Dimensions
97 × 180 cm
Rating
6.3
Paper
Half-Cooked Red Star Mo She 6-Foot Bark Xuan Paper, self-sized
Ink
Yi De Ge Yun Tou Yan, Boku-Undo Gentoku Super Concentrated, Yi De Ge Pine Soot Ink, Shisan Yue Calligraphy and Painting Ink, colour inks
Enquire about T_417Availability, price or a studio visit. Peter replies himself; asking commits you to nothing.

The block in the corner is the stone, after. The sun had shut herself in a cave over a matter of insults, and the whole country went black, and the gods gathered at the door with no plan. One of them got up on an upturned tub and danced until her clothes came off, and heaven laughed so loudly that the sun opened the door a crack to ask what could be funny in the dark. They showed her a mirror. A strong god took the rock and threw it, and I am told it landed a long way off. I have seen it. It lies where it fell, square and embarrassed, while violet creeps back along the edge of everything.

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 V23's reads, from the settled findings, and checked by hand before approval. It explains V23's numbers and may not change them.

Structure
great black fan arc, smaller inner arc beneath, block across crown, separate corner slab
Movement
sweep from left over to lower right; top block, vertical band, corner slab run against it
Coverage
ink on about three quarters of the paper
Tone
five tonal steps, weighted dark
Layering
three kinds of pass, violet, translucent grey, black; readable at rims and lower centre
Edges
crisp on fan wall and blocks; soft in grey rims; broken at lower right and violet
Feibai
none
Open paper
pale band over the arc and upper corners; small pocket beneath the inner arc
Colour
violet, dragged around the outer rim and gathered in the lower centre
Chance marks
pale specks in corner slab; clotted pooling at vertical band's foot; fine spatter near rims
Frame
ink runs off left and bottom at the slab, top at the block; right stays open

A black fan the width of the sheet swings up from the left, crests under a block laid across its crown, and comes down hard at the lower right. Its outer wall stays firm the whole way round and its outline follows the brush, so all that bulk still reads as one swing.

The finest painting lies beneath it, in the lower arc. Greys step through one another there, thin over thinner, and a vertical band crosses them with both still legible. The alum size in this half-cooked paper keeps each pass apart. At the lower right the black breaks into bristle over dry violet, and the sheet finds its only real speed.

The great black gives less. It buries most of what lies under it, so the depth stays at the rims. The slab at bottom left costs most: flat, blunt, cut off by the corner, flecked with small pale specks, and tied to nothing in the sweep.

So this is good work, sure of its main move, with more black than it can use. The lower edges repay anyone who walks in close, and the corner slab sets the ceiling.

Read and measured

The rating

THE RATING

T_417, rated 6.3

The combined score, out of 10: V23's reading of the photograph as the read half and V24's twelve tests on the 16-bit file as the measured half, added and divided by 10. The scale is relative to this archive. How each half is made is on the Method page.

READ HALF28.5V23's rating, 5.7, × 5
+
MEASURED HALF34.9twelve tests, of 50
→
RATING6.363.4 ÷ 10
THE READ HALF, V23
Form
2.0 · built
Tonal depth
2.0 · modelled
Layering
2.0 · legible
Composition
2.0 · working
Material and surface
1.8 · sound
THE MEASURED HALF, V24
Mass
8.7 of 10
Tone
6.2 of 14
Void
4.8 of 8
Flow
8.8 of 10
Balance
6.4 of 8
Measured

How it was measured

FROM THE 16-BIT FILE

What V24 measured.

Plain physical facts with no model involved. Across the year they track how the practice changes. On one sheet they cannot say whether a mark is any good. Millimetres read a few percent high, because the photographs are cropped just inside the paper's edge.

MASS WIDTH186 mm

The width of the ink mask along its medial axis.

DEPTH OF THE DARKS1.72

Optical density at the 75th percentile of the sheet.

LARGEST VOID213 mm

The radius of the largest circle of open paper.

DIRECTIONS0.17

How far the marks align across the sheet. Lower means they run several ways.

BALANCE0.54

Left and right asymmetry of the ink. Lower is more even.

THE FILE3.94

Pixels to the millimetre in the TIFF these were measured from, with the studio light removed.

Read by the Visual Analysis Engine, version 23.13, on 2026.11.03: 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_417T_417, tone-stretchedT_417, classed by brightness
77%of the sheet carries ink
Black 74%Grey 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: 0.064 (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, 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 surface2SOUND2SOUND1FLAWED2SOUND2SOUND1.8

READ 1, IN ITS OWN WORDS

“A bold, ordinary sheet: a huge black arc with a clear sweep and legible violet and grey rims, but its bulk, near-flat interior and blunt blocks keep it from the concentric depth of R3.”

Form · BUILT

Central arc holds firm curved walls and tracks the sweep, but reads as a bulky filled fan; top and bottom-left blocks are stiff, blunt slabs.

WEAKEST Blunt slab block cut off at bottom left

STRONGEST Great black arc whose outline follows the sweep of travel

Tonal depth · MODELLED

Lower arc and rim bands step through greys; the main black shows faint arcs and a rightward deepening only when stretched; bottom-left block stays flat.

WEAKEST Bottom-left block, nearly flat black inside

STRONGEST Lower inner arc with stepped translucent greys

Layering · LEGIBLE

Violet, translucent grey and black passes read at the rims and lower arc, where the vertical stroke shows through; the dense centre hides the sequence.

WEAKEST Black arc covers most earlier passes across the centre

STRONGEST Vertical stroke and grey steps legible through lower arc

Composition · WORKING

Arc drives across the frame and shapes the paper above and the pocket below; its sheer mass dominates, and the bottom-left block only loosely counterweights it.

WEAKEST Heavy central mass; detached bottom-left block feels parked

STRONGEST Sweeping arc carrying the eye from left to lower right

Material and surface · SOUND

Ink is controlled with dry-brush fringes at lower right and violet rims; small pale specks at bottom left and fine crease lines at right stay minor.

WEAKEST Pale specks in the bottom-left black block

STRONGEST Dry-brush violet and black fringes along the lower right

FLAWS

3 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 3 distinct places, 12 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.

5 × OTHER“Fine crease or crack lines in the darkest par…”5 × OTHER · MAJOR“Small pale specks in the upper part of the bo…”2 × OVERWORK“Clotted dark pooling at the foot of the verti…”OVERWORKOTHERMAJOR

V23's rules and arithmetic, and every figure under its own name, are in the Archive record.

Date

2026.11.03, day 310 of the Crucible Year, one of 11 paintings from that date. 13 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: P4 S14 (working title).

Every painting from 2026.11.03 is on this site. 6 other dates with more than five works are shown in full.
THE YEAR

T_417 among all 419

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

Every painting from 2026.11.03 · This date in the year

Materials

Paper
Half-Cooked Red Star Mo She 6-Foot Bark Xuan Paper, self-sized, China Xuan Paper Co., Ltd., made 2026.04.08
Ink MB6
Yi De Ge Yun Tou Yan, Yi De Ge (Beijing)
Ink MB8
Boku-Undo Gentoku Super Concentrated, Boku-Undo
Ink MB9
Yi De Ge Pine Soot Ink, Yi De Ge (Beijing)
Ink MB10
Shisan Yue Calligraphy and Painting Ink, Shisan Yue (Thirteenth Month)
Colour
colour inks, recorded together
The sheet of paper was made 209 days before this painting.
When each paper was in use