Crucible Year Peter Yuill
Archive · full record

T_270

The work as shown. Every value below comes from vae.db, the master database of the Crucible Year.

Recorded

Date
2026.04.26, day 119
Size
97 × 180 cm
Paper
S4, Tanxi half-raw, 6-foot
Inks
MB4, MB5, MB6
Phase
P2 The Switch
Shown on the site
yes (V23 rating of 5.0 or higher)
Early storage triage
SA: save, archive (Peter's early system, since retired)

Measured · V23 (v23.8)

V23 rating
5.2
Form
2
Tonal depth
2
Layering
2
Composition
2
Material and surface
1.2
Ink cover
83%
Dark share
47%
Tonal steps
6
Flaws named by the reads
other 15, water stain 5, ring 1
The V23 rating runs from 1 to 9, with 5 the middle of this body of work. It is the engine's reading, and the reference the archive is measured against.

Older engine

V7
6
From an earlier engine (V7). Its scale differs from V23's, so it is only ever compared with other readings by the same engine.

How the number was made

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_270T_270, tone-stretchedT_270, classed by brightness
83%of the sheet carries ink
Black 47%Grey 43%Light 11% SHARE OF THE INK, NOT OF THE SHEET
TONAL STEPS

6 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: 0.052 (under 0.045 reads as flat).

0.300.75123456 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 surface2SOUND1FLAWED1FLAWED1FLAWED1FLAWED1.2

READ 1, IN ITS OWN WORDS

“A bold S-curve with legible grey layering and good direction. Blunt slabs, flat-ish grey interiors, a crowded right side and paper creases keep the sheet ordinary, near R2.”

Form · BUILT

The main S-curve band holds its walls and follows the stroke. The upper-right grey block and the dark wedge are blunt, slab-like fills.

WEAKEST Bulky grey rectangular slab, upper right

STRONGEST Sweeping dark S-curve following the brush's travel

Tonal depth · MODELLED

The stretched view shows arcs and stepped density in the left and lower dark curve. The grey slab upper right is mostly uniform. Modulation of 0.052 is modest.

WEAKEST Upper-right grey block, nearly flat inside

STRONGEST Banded arcs inside the lower dark curve

Layering · LEGIBLE

Two or three passes: pale grey band, mid-grey slabs, black curve. The overlaps at lower centre read clearly, but the black mostly covers what lies under it.

WEAKEST Black curve largely covers the earlier grey passes

STRONGEST Grey bands overlapping the dark curve at lower centre

Composition · WORKING

The strong S direction shapes the inner white loop. With 83% coverage the sheet is crowded, and the top-right slab sits heavily against the curve.

WEAKEST Upper-right block competes and crowds the right side

STRONGEST S-movement carrying the eye from top to lower right

Material and surface · SOUND

Ink is controlled. Fine paper creases run through the black mass. There is a small white skip at centre and scattered drops lower left and right; all are minor.

WEAKEST Crease lines crossing the dark curve interior

STRONGEST Dry-brush feathered edge of the dark wedge

FLAWS

4 distinct places, 2 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, 21 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 · MAJOR“paper crease lines through the dark curve”6 × OTHER, WATER STAIN · MAJOR“white skipped patch inside the grey at the lo…”5 × OTHER, WATER STAIN“stray drips and specks beside the grey block”5 × WATER STAIN, OTHER, RING“pale drops and spatter at the lower-left edge”WATER STAINRINGOTHERMAJOR
GEOMETRY

Measured from the 16-bit master.

The previous engine (V22) measured this sheet's master file: 1 principal ink mass traced (cyan), 2 enclosed voids at true size in their grid cells (amber), the main gesture from start to end (red). Of 18 edge segments, 39% crisp, 50% soft or bloomed, 11% broken.

A1B1C1D1E1F1A2B2C2D2E2F2A3B3C3D3E3F3H1H2
RULE 1Two tonal steps or fewer

Tonal depth held at rung 1.

6 steps: not applied
RULE 2A major flaw

Material held at rung 1. Mild waves in the unmounted paper are never a flaw.

4 major flaws: applied
RULE 3Any quality below 0.5

The rating cannot exceed 4.

lowest 1.2
RULE 4At least two valid reads

A read that breaks the reply format is discarded.

5 of 5 valid
THE ARITHMETIC

V23 rating 5.2.

Engine v23.8, 5 reads. Fixed arithmetic, the same for every painting; the constants were set on 24 randomly chosen paintings so the median sheet scores 5. The scale is relative to this archive, not to painting in general, and a difference of less than half a point between two paintings is noise.

MEAN RUNG1.84(2.0 + 2.0 + 2.0 + 2.0 + 1.2) ÷ 5
→
RAW4.681 + 2 × 1.84
→
RATING5.25 + 2.086 × (4.68 − 4.60)