a founder of the codex

Chiaroscuro

Sciophota sculpens·the Rounding Shadow

From Greek skia, shadow, and phos, light, and Latin sculpere, to carve, the light and shadow that carve a form.

Level: Conceptorganism
Book: Semaphorathe bestiary of display
Phylum: Balanceimage schema
Class: Outputits display
Niche: Parasitethe mechanism of a host idea
Mode: Techniquehow it keeps existing
Stage: Matureindividuated
Status: Living
Habitat: Archive

Its kinds · Roget, 1852: Organic Matter · Wilkins, 1668: Sensible Quality · WordNet, 1990: Communication · Llull, 1308: K · Instrumentative

Rounding Shadow, the whole specimen — Plate IV. Sciophota sculpens, the whole specimen.

Light set against dark across a surface makes a flat image look round, since the eye reads graded shade as a form turning away from the light.

Light shows the shape of a thing only where shadow is allowed to fall on it.

behavior Keeps to the edge of a single light, turning one side to it and sinking the other into dark.

provocation

What in front of you would go flat if its shadows were taken away?

Each draw is the being derived afresh by the current laws at another seed (laws §11); the chosen one leads (where they sit in the morphospace).

I Dissection

Each organ answers one question about the idea. The framed one, its output, is the dominant organ: the being's class, the one the idea could not lose and stay itself.

Kernel of Chiaroscuro — Fig. 1. Kernel
Terminator line
Which premise, if it were false, would kill this idea?
A form looks solid when light and dark are set against each other across it, the lit side turning by degrees into shadow.¹
drawn as: glyph · view: cast

Boundary of Chiaroscuro — Fig. 2. Boundary
Cellar light
What sets it apart from what it is not, and how does it keep that distinction?
It is set apart from flat, even light, which shows colour and outline and hides depth, and it keeps that distinction by holding to one strong light and letting the rest fall dark.^{1, 2}
drawn as: margin · view: magnified

Intake of Chiaroscuro — Fig. 3. Intake
Core shadow
What must it feed on to work? What has to be present, noticed or supplied?
It feeds on shadow, the shade on a surface turned from the light and the darkness that swallows its edges, and it needs one strong source to cast them.^{2, 5}
drawn as: ocellus · view: pressed

Mechanism of Chiaroscuro — Fig. 4. Mechanism
Shape from shading
How does it turn what it takes in into what it gives out?
The eye reads graded tones as a surface curving toward or away from a light it assumes falls from above, so paint on a flat ground swells into relief.⁴
drawn as: chromatophore · view: pinned

Output of Chiaroscuro — Fig. 5. Output
Relievo
❦ dominant organ
What does it make possible, visible or knowable?
It gives relief, the weight and depth of a figure on a flat surface, and lifts the lit figure out of the dark as the centre of the scene.¹
drawn as: display · view: detached

Dispersal of Chiaroscuro — Fig. 6. Dispersal
Cast shadow
What part of it travels into other minds, ideas and fields, and by what vector?
It travels in cast shadows, which painters, photographers and filmmakers place to show where a thing stands, where the light comes from and what waits out of view.³
drawn as: ink · view: series

Decay of Chiaroscuro — Fig. 7. Decay
Muddy greys
What can it not digest, where does it fail, and what does it leave behind for others?
Under even light its contrasts level into one grey and the volume goes flat. Pushed to excess, its shadows swallow the forms they model and leave lit fragments floating in the dark.^{4, 2}
drawn as: palimpsest · view: microscope

II Meaning associations

No relations recorded yet.

descent membership food web resemblance or friction

Lineage

A founder, dissected by hand.

Kin

same kind in Roget Amber, Breath, Chimera, Entelechy, Music, Silence, Vertigo, The Common Lung, Shared Breath

same kind in Wilkins Qualia

same kind in WordNet Echolalia, Music, Prophecy, Syllable, Symbol, Babelhum, Poetry

same kind in Llull Faith, Geomancy, Innocence, Music, Patience, Ritual, Syllable, Symbol, The Shaping Pause, The Festival Calendar, Subtractive Phenomenology

same phylum Equinox, Salt, Symmetry, The Shaping Pause

same dominant organ Apophenia, Echolalia, Emergence, Erosion, Mimesis, Nostalgia, Placebo, Rain, Babelhum, Afterlistening, The Festival Calendar

Genome

contrast
shadow
light also in Equinox
volume
relief also in Erosion, Witnessed Relief, Witnessed Relief (Mycelia)

III In the world

Echoes

Caravaggio's Calling of Saint Matthew
Rembrandt's late self-portraits
the hard shadows of film noir
a face lit by a single candle

IV Record

How it was drawn

its draw 1, a point in the morphospace (laws §8), drawn by flux-2-klein-4b.safetensors.

axis	value
book	semaphora
symmetry	amorphous
organization	segmented
silhouette	fan
scale	hand
proportion	tapering latent
growth	budding
articulation	telescoping latent
openness	sheet latent
skeleton	unmarked latent
locomotion	rolling latent
pattern	reticulate latent
coloration	eyespots
substance	petal tissue
surface	iridescent
palette	storm
luminosity	sheen
transparency	layered latent
gesture	emits
unity	unmarked latent
modality	unmarked latent
causation	formal
determinacy	doubled latent
fusion	graft
anomaly	false shadow
graft	lenses
technique	chromolith
viewpoint	above
value	unmarked latent
balance	cantilevered latent
density	intricate
rhythm	alternating latent
saturation	vivid latent
appendages	ocelli, frills
anchor (body)	an orchid whose lip is shaped like a lure
anchor (detail)	manganese dendrites, fern-like black branching on stone

Sources

Leonardo da Vinci, Treatise on Painting (first printed 1651)
Michael Baxandall, Shadows and Enlightenment (1995)
E. H. Gombrich, Shadows: The Depiction of Cast Shadows in Western Art (1995)
V. S. Ramachandran, Perception of Shape from Shading (Nature, 1988)
Jun'ichirō Tanizaki, In Praise of Shadows (1933)

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