Chiaroscuro

Chiaroscuro (pronounced kee-ahr-uh-skyoo-roh)

(1) The distribution of light and shade in a picture.

(2) In painting, the use of deep variations in and subtle gradations of light and shade in color, especially to enhance the delineation of character and for general dramatic effect.

(3) In monochrome painting, using light and dark only, as in the grisaille technique.

(4) The artistic distribution of light and dark masses in images.

(5) A woodcut print in which the colors are produced by the use of different blocks with different colors.

(6) A sketch in light and shade.

1680-1690: From the Italian chiaroscuro (disposition of light and dark in a picture (literally "bright-dark"), the construct being chiaro (clear, bright) from the Latin clārus ((clear, bright, renowned, famous, illustrious)) + oscuro (dark) from the Latin obscūrus (dark, dusky, shadowy, indistinct, unintelligible, obscure, intricate, involved, complicated, unknown, unrecognized; (of character) reserved, secret, close). Related forms are the nouns chiaroscurist and chiaroscurism.  The seventeenth century Italian forms were chiaroclear and oscuroobscure.  Chiaroscuro is a noun & adjective, chiaroscurist is a noun and chiaroscuroed is an adjective; the noun plural is chiaroscuros or chiaroscuri.

De koppelaarster (The Matchmaker) (1625) by Gerrit van Honthorst (1592–1656).

In oil painting, the technique of Chiaroscuro emerged during the Renaissance.  Essentially, it aimed to create the optical illusion of three-dimensional forms by emphasizing the tonal contrasts between light and dark. It’s a clever artistic trick achieved by having light fall against the edges of solid, darker forms and the most celebrated exponents were Leonardo da Vinci, Caravaggio, and Rembrandt.

Three photographs of Lindsay Lohan following the chiaroscuro technique.

Now less fashionable in painting, probably because modern artists are understandably not anxious to seek comparison with old masters, it’s perhaps the dominant technique in photography and when working in monochrome, it can produce fine results.  Called the Rembrandt technique or Rembrandt lighting, it’s also been occasionally adopted by film directors although it’s difficult to execute and ultimately renders a product not at all realistic which sometimes can be the director’s intent; sometimes perhaps not.  In the case of some Soviet cinema, the technique was adopted and is considered a distinctive element in many works in the genre of "socialist realism" although that is something quite distinct from "appearing realistic".  Soviet art was riddled with such paradoxes.

Paris-based Bulgarian photographer Elina Kechichevna (b 1979) created Dior’s 2021 Spring Summer collection (SS21) campaign, emulating Caravaggio’s (1571-1610) masterful handling of the technique of chiaroscuro.  Thematically, Kechichevna explored a number of strands including feminist thought, romanticism and the interplay of chiaroscuro’s layering of light with tricks of geometry in placement.

Primitive

Primitive (pronounced prim-i-tiv)

(1) Being the first or earliest of the kind or in existence, especially in an early age of the world.

(2) Early in the history of the world or of humankind.

(3) Characteristic of early ages or of an early state of human development.(4) In anthropology, of or relating to a preliterate or tribal people having cultural or physical similarities with their early ancestors: no longer in technical use; denoting or relating to a preliterate and nonindustrial social system.

(5) Unaffected or little affected by civilizing influences; uncivilized; a savage (some historians once distinguished between barbarians and savages on what was essentially a racist basis).

(6) Being in its earliest period; early; old-fashioned.

(7) In art, an artist of a preliterate culture; a naïve or un-schooled artist; an artist belonging to the early stage in the development of a style; a work of art by a primitive artist; an artist whose work does not conform to traditional, academic, or avant-garde standards of Western painting, such as a painter from an African or Oceanic civilization

(8) In fine art, a painter of the pre-Renaissance era in European painting (usually as "Italian primitive"); the works of these artists or in their recognizable style.

(9) In mathematics, a geometric or algebraic form or expression from which another is derived or a function of which the derivative is a given function; a function the derivative of which is a given function; an anti-derivative.

(10) In linguistics, the form from which a given word or other linguistic form has been derived, by either morphological or historical processes, as take in undertake (the most recent common ancestor (although sometimes hypothetical)).

(11) In biology, of, relating to, or resembling an early stage in the evolutionary development of a particular group of organisms; another word for primordial.

(12) In geology, pertaining to magmas that have experienced only small degrees of fractional crystallization or crystal contamination; of, relating to, or denoting rocks formed in or before the Paleozoic era (obsolete).

(13) In Protestant theology, of, relating to, or associated with a minority group that breaks away from a sect, denomination, or Church in order to return to what is regarded as the original simplicity of the Gospels.

(14) In computer programming, a data type that is built into the programming language, as opposed to more complex structures; any of the simplest elements (instructions, statements) in a programming language.

(15) In digital imagery, artistic training and certain aspects of engineering and architecture, a set of basic geometric shapes which can be used individually or from which more complex shapes can be constructed.

(16) In grammar, original; primary; radical; not derived.

1350-1400: From the Middle English primitif (of an original cause; of a thing from which something is derived; not secondary (used as both noun and adjective and originally in the sense of "original ancestor")), from the Middle French primitif (very first, original) from the Latin prīmitīvus (first or earliest of its kind), from primitus (at first), from prīmus (first).  The alternative spelling primative is long obsolete.  Primitive is a noun & adjective and primitiveness & primitivism are nouns; the noun plural is primitives.

The meaning "of or belonging to the first age" was from the early fifteenth century and was applied especially in the Christian church in the sense of "adhering to the qualities of the early Church."  The secular version of this meaning "having the style of an early or ancient time" was a nostalgic expression, an allusion to the (supposed) simplicity of the "old days" emerged in the 1680s.  The use during the era of European colonial expansion to mean "an aboriginal person in a land visited by Europeans" is from 1779, thus the idea of a primitive being an "uncivilized person".  To the colonial powers it was quite an important point to make because, being "uncivilized" (1) there could of course not be a legal system and thus no conception of the "ownership" of land and (2) such lands the Europeans "discovered" could be declared Terra nullius (from the Latin meaning "nobody's land" (literally "land belonging to nobody").  In Western anthropology, the idea persisted and by the late nineteenth century it was applied to cultures which, through isolation, had continued to operate at a technologically simple level, and even by the mid-late twentieth century it was common for mainstream historians to distinguish between "civilizations" and mere "cultures".  Reflecting both the snobby disdain for the pre Renaissance Italian primitives and perhaps as an allusion to prehistoric cave art, critics in the early 1940s applied the label "primitive" to artists thought "untrained", water-colorists seemingly a particular target.

The Italian Primitives

Technically, the phrase “Italian primitives” refers to works of art created between late eleventh and early fourteenth century with a particular emphasis on the later years.  It wasn’t until the late eighteenth century that historians and collectors first showed notable interest in Italian primitives and it’s indicative of the attitudes of the time that the artists of the era were often classified as “Italian pre-Renaissance” or “proto-Renaissance” painters; as late as the 1970s, “Italian primitives” was something of a pejorative term, such was the reverence for the works of the later Italian Renaissance, especially the High Renaissance (1495–1520), and Mannerism (1520–1600).

Two works by Cimabue (Cenni di Pepo, circa 1240–1302): Castelfiorentino Madonna (circa 1283), tempera & gold on panel (left) and Santa Trinita Maestà (circa 1295), tempera on panel (right).  The early Italian primitive style contrasted with a work representing the later intrusions of technique and dimensional imagination.  It is however misleading to speak of "early" and "late" Italian primitives in the sense of a definable stylistic shift, works with the classic Byzantine lines and form still being painted (for a receptive market) even in the early Renaissance and there would of course be a revival of sorts in some of the schools of early twentieth century modernism.

The role the Italian primitives played in the transition from the Byzantine artistic tradition to the more naturalistic and humanistic style that would later characterize the Italian Renaissance was of course acknowledged but the works themselves were usually treated as something imitative or at least derivative of the earlier techniques despite there being an obvious move away from the strict stylization and abstract qualities of Byzantine art, elements of naturalism, spatial depth, and even an exaggerated emotional expression appearing.  The Renaissance was not one of those moments in art when there was an abrupt shift from one stylistic tradition to another and the Italian primitives were part of series of developments in art, architecture and culture that typify the forces which become epoch-making.  The emphasis on perspective, anatomical accuracy and depictions of the range of human emotion so associated with the Renaissance owes much to the Italian primitives, not only in technique but also what came to be regarded as acceptable subject matter for art and one might suspect the Renaissance masters, revolutionary though they were, perhaps regarded the earlier tradition with more reverence than the critics who were so seduced by the sumptuousness of Leonardo, Michelangelo, and Raphael.

Crucifix of Santa Maria Novella (circa 1280), tempera on wood by Giotto (Giotto di Bondone, circa 1267-1337).  Among the Italian primitives, the works of Giotto provide some of the finest illustrations of the emergence of elements which the Renaissance masters would refine and perfect.  His Crucifix of Santa Maria Novella is very much in the vein of earlier works by Giunta Pisano (circa 1180-circa 1260) and Cimabue and details how the Italian primitives didn't wholly abandon the hieratic solemnity of Byzantine iconography but weren't constrained by their formulaic traditions, returning to a realism which would have been familiar in antiquity.  The use of embryonic techniques of perspective and chiaroscuro created a depth and volume which would later become the dominant motif in European art.

Graphics Primitives in Digital Images

Lindsay Lohan constructed in graphic primitives by MeygaHardy on DeviantArt.

In digital imagery (vector graphics, CAD systems et al), graphic (sometimes called geometric) primitives are the simplest form of shape which can be rendered and scaled for display on a screen (although in advanced engineering, as mathematical expressions, there are pure geometric primitives which can’t be displayed although they can be manipulated) and are sometime thus described as “irreducible” or “atomic”.  The origin of all graphics primitives are the point (technically the representation of a point as a point exists in space as a dimensionless address) and the straight line (that which extends from one point and another).  These lives were the original vectors and the earliest computers could handle only lines and points, thing like triangles and squares being constructed from these.  Graphic primitives are now more extensive and from assembling these, more complex shapes can be built.  Among mathematicians, there are debates about just what can be said to constitute a pure primitive, some suggesting that if a shape can be reduced to two or more shapes, it doesn’t qualify but for most they’re just handy objects and the technical squabble passes unnoticed.  The principle of graphic primitives underpinned the techniques of the early cubist artists.

Primitif by Max Factor (1956).  The use of the French adjective Primitif lent the product a continental connection but it's the masculine form, the feminine being primitive.

Shadow

Shadow (pronounced shad-oh)

(1) A dark figure or image cast on the ground or some surface by a body intercepting light.

(2) Shade or comparative darkness, as in an area.

(3) As “the shadows”, darkness, especially that coming after sunset.

(4) A spectre or ghost.

(5) A mere semblance of something.

(6) A reflected image, as in a mirror or in water (now rare and restricted to literary or poetic use).

(7) In painting, drawing, graphics etc, the representation of the absence of light on a form.

(8) In art, the dark part of a picture, either representing an absence of illumination or as a symbolic device.

(9) In architectural depictions & renderings (as “shades and shadows”) a dark figure or image cast by an object or part of an object upon a surface that would otherwise be illuminated by the theoretical light source.

(10) In Jungian psychology, the archetype that represents man's animal ancestors; an unconscious aspect of the personality.

(11) In pop-psychology (1) a period or instance of gloom, unhappiness, mistrust, doubt, dissension, or the like, as in friendship or one's life or (2) a dominant or pervasive threat, influence, or atmosphere, especially one causing gloom, fear, doubt, or the like (often expressed as “shadow of fear”, “shadow of doubt” et al).

(12) A person who follows another in order to keep watch upon that person (in law enforcement, espionage etc).

(13) To overspread with shadow; to shade.

(14) To cast a gloom over; to cloud.

(15) To screen or protect from light, heat, etc; to provide shade.

(16) To follow and observe (a person).

(17) To represent faintly, prophetically etc. (often followed by forth).

(18) In democratic politics, (of or pertaining to a shadow cabinet or shadow minister) a system whereby an opposing politician formally is appointed to be responsible for matters relating to a particular minister’s areas of authority.

(19) As a modifier (shadow ban, shadow ticket, shadow docket, shadow price, shadow inflation etc), something effected unofficially or without public notice; characterized by secrecy or performed in a way that is difficult to detect; a clandestine approach.

(20) In typography, the “drop shadow” effect applied to lettering.

(21) An uninvited guest accompanying one who was invited (an obsolete, Latinism).

(22) In human resource management, the practice of new appointee accompanying an incumbent during the working day, so as to learn the job.

(23) In computer programming, to make (an identifier, usually a variable) inaccessible by declaring another of the same name within the scope of the first.

(24) In computing, in the graphical Workplace Shell (the WPS, successor to the Presentation Manager (PM)) of the OS/2 operating system, an object representing another object.

Pre-900: From the Middle English noun shadwe, shadu, shadue, shadowe shadow, from the Old English sċeaduwe, sċeadwe & sceadu, the oblique case forms of sċeadu (shadow, shade; darkness; protection).  The Middle English verbs were shadwen, shadwe, shadu & shadue (to shade, provide shade, cast a shadow, protect), from the Old English sceadwian (to cover with shadow, protect) (all derivative of the nouns), from the Proto-West Germanic skadu, from the Proto-Germanic skadwaz (shade, shadow), from the primitive Indo-European skeh & ḱeh- (darkness).  Contemporary forms included the Old Saxon skadowan & skadoian and the Gothic (ufar)skadwjan (to (over)shadow).  Similar forms in other Germanic languages included the Old Saxon skado, the Middle Dutch schaeduwe, the Dutch schaduw, the Old High German scato, the German schatten and the Gothic skadus (shadow, shade).  Shadow is a noun, verb & adjective, shadower is a noun, shadowdy, shadowless & shadow-like are adjectives; the noun plural is shadows.

The shadow-box was a protective display case, usually in the form of interlocking squares and wall-mounted was first advertised in 1892.  The term shadow-figure was a synonym of silhouette, dating from 1851.  Eye-shadow was a term invented for the commercial products which came onto the market in 1918, providing a convenient packaged product to achieve the look women (and apparently not a few men) had been creating for thousands of years.  Shadow-boxing was first noted in 1906, an update of the earlier (1768) shadow-fight.  The verb foreshadow (indicate beforehand was a figurative form, the idea apparently of a shadow thrown before an advancing material object as an image of something suggestive of what is to come.  It’s familiar also in the forms foreshadowed & foreshadowing and was used as a noun since at least 1831.  Although the meanings were different, in Old English there was forescywa (shadow) & forescywung (overshadowing).  The adjective shadowy was ultimately from late fourteenth century shadwi & shadewy (full of shadows, shaded (and also “transitory, fleeting, unreal (resembling a shadow)”).  From very late in the eighteenth century it conveyed the sense of “faintly perceptible”.  In The Old English there was sceadwig (shady) and the modern alternative is shadowiness but unfortunately, the marvelously tempting shadowous never caught on.  The noun shadowland came from a work of fiction in 1821 and meant “an abode of ghosts and spirits”, adopted from the early 1920s to mean an indeterminate or unhappy place”.  The noun shadowless was from the 1630s and meant literally “no shadow” the implication being of things ungodly or supernatural.

In idiomatic use shadow often appears.  To be a shadow of one's self is to have suffered some trauma meaning one is a lesser person than before.  One afraid of one’s own shadow is one of a skittish, nervous disposition.  If something is beyond a shadow of a doubt it is something certain.  The old expression sanctuary in the shadow of the church was not exactly literal: to seek sanctuary from the agents of the state by entering a church meant one had to pass through the door.  It referred to the noting that church soil in England was under the authority of the pope in Rome, not the King.  To throw (or cast) a shadow over someone is to seek to deny them visibility; to keep them out of the limelight.

1969 Rolls-Royce Silver Shadow.

In continuous production until 1980, the Rolls-Royce Silver Shadow was introduced in 1965 and with over 30,000 (including the less common but substantially identical Bentley T2 variant) built, it remains the Rolls-Royce made in the greatest volume.  Although there was little about the model which was cutting-edge, it was the first truly modern Rolls-Royce, forsaking the separate chassis, drum brakes and styling which used updated motifs from the 1930s; it was the template with which the company would underpin its products for the rest of century.  Although the huge Phantom V & VI limousines would continue to use a separate chassis until 1990, their annual production was measured (usually at most) in the dozens and it was the Silver Shadow and its derivatives which were the company’s bread and butter.  The adoption of unitary construction meant the end of the line for many specialist coachbuilders and some of the relics of the industry were absorbed by the factory, the Mulliner name still used by Bentley to adorn the even more expensive “special order” vehicles the 1% need to convey the message of wealth something "off the shelf" can’t manage.

1967 Rolls-Royce Silver Shadow two-door saloon by James Young (left) and 1971 two door saloon by Mulliner Park Ward (MPW) (right).

However, on the Silver Shadow platform, James Young, one of the last surviving coachbuilders, did build 35 two-door saloons before the business was shuttered in 1968.  The quirk of the James Young Silver Shadows is truly they were just the standard car with the rear-doors removed and the front units lengthened and it suffered because the competition was the two-door designed by Mulliner Park Ward (MPW) which by then was a specialist division within the factory.  With greater resources and access to all the technical data, the MPW effort was more imaginative and judged universally to be more attractive, its “cow-hip” style (nobody ever suggested using the "cokebottle" appellation Chevrolet & Pontiac had a few years earlier made a trend) carried over when the car was in 1971 re-named Corniche and listed as a regular production model.  The Corniche proved the longest-lived of all the Silver-Shadow family, the convertible (even Rolls-Royce eventually gave up calling such things drophead coupés (DHC)) remaining available until 1996.

Applied with different colors in different ways, eye shadow can achieve various effects.  Lindsay Lohan demonstrates.

The archeological evidence suggests eye shadow is one of humanity’s oldest forms of make-up, worn (usually but not exclusively by women) for thousands of years, and the preparations have included oils and a variety of substances to create the desired colours including minerals & vegetable extracts although charcoal is thought to have been one of the most accessible and popular materials.  The usual rationale for applying eyes shadows is that it’s essentially the same technique as chiaroscuro, a trick used by painters, photographers & film-makers to use real & emulated light and dark to achieve the perception of depth.  Because shadows are inherent to the shape of the eye-socket, eye shadow can be use to accentuate or soften the effect and, if applied with expertise, can even alter perceptions of size and shape.  With a sympathetic choice of shade, the color of the eyes can also be used as a contrast, some taking advantage of colored contact lens to create a look impossible with their natural irises.  Done well, there's no other way to describe the combination of eye shadow and purple contact lens that "eye catching".  Eye shadow can draw attention to the eyes, most trying to make them appear larger, more vibrant, or more expressive.  Despite the name, eye shadow is a flexible product and often used to create a visual illusion on body parts such as the cheeks or décolletage.

Shadow Volumes

Example of shadow mapping with Python summarized by FinFET.

In computer graphics, shadow volume is a technique used to render realistic shadows in three-dimensional (3D) renderings which is employed primarily when dynamic, interactive real-time movement is needed, most obviously in gaming.  Essentially, generating shadow volumes involves determining those addresses in a scene which need to appear as shadows, then rendering them accordingly.  The technique relies on the concept of extruding the boundaries of shadow-casting objects to create a "shadow volume" that represents the space occluded by the object.  In static scenes this was always easy (if once time-consuming) to achieve but when objects nwere moving, until recent decades, the graphics capabilities of computers were insufficient for them to be rendered in anything close to being real-time.  The process essentially is:

(1) Determining shadow casters: The rendering engine identifies objects in the scene capable of casting shadows by calculating the object's position and shape and its relationship to the positions of light sources.

(2) Creating shadow volumes: For each shadow-casting object, the engine constructs a shadow volume based on extending the object's silhouette (defined by the address of the boundaries) in the direction opposite to the light source.  The silhouette is determined by the math of the boundaries viewed from the perspective of the relevant light sources.

(3) Intersecting shadow volumes: The shadow volumes are then intersected with other objects in the scene to determine which parts of those need to be inside or outside the shadow.

(4) Rendering shadows: The shadow volumes are assembled, rendered with darker hues or modified shading techniques to simulate the shadowed regions.

Shadow volumes can be implemented using more than one different algorithm, the most commonly used the z-pass and the stencil buffer.  All techniques are computationally intensive and have been made possible by the advances in the sheer power and complexity of modern graphical processing units (GPUs).

The Microsoft Volume Shadow Copy Service (VSS)

The handy Nirsoft Utilities includes a Shadow Copy viewer.

Microsoft introduced Volume Shadow Copy Service (VSS) with Windows XP (2001).  It worked in conjunction with the High Performance File System (HPFS) and allowed for the creation of point-in-time snapshots or copies of files and volumes on a disk.  What was in 2001 still something of a novelty for most users was the snapshots were taken while the files were in use, enabling access to previous versions or the restoration of files to a specific state, even if they have been been modified or deleted.  The process sequence was:

(1) Snapshot creation: VSS creates a snapshot of a volume or individual files on a disk.  This snapshot represents a "shadow" of the data at a moment in in time.

(2) Copy-on-write mechanism: As files are modified or deleted on the original volume, the VSS utilizes a copy-on-write mechanism.  It stores the original data in the snapshot, allowing users to access the unchanged version while the new changes are written to the live volume.  The lag induced by this can be measured with the appropriate but except with the largest files or on a busy network, it’s not usually something which affects the user.

(3) Shadow copy storage: The shadow copies are stored in a separate location on the disk, typically in a hidden system folder. The storage space occupied by is system-managed by the system, older copies automatically deleted as space is demanded for newer versions.

(4) User accessibility: Users can access the shadow copies through various means, most obviously the "Previous Versions" tab in file properties or the "Previous Versions" feature in Windows Explorer. These interfaces allow users to browse and restore files from a previous point in time.

Shadow copies provided one of the first forms of dynamic file backups for most users and were a convenient form of data recovery without the need of third-party software or external devices.  At scale, similar processes are used by software by companies such as StorageCraft’s ShadowProtect which system administrators can configure in a way that the potential data-losses can be minimized to windows as short as a few minutes.  Combined with off-site backups on large capacity media, it’s still a pest practice approach to data preservation.

Lindsay Lohan's strangely neglected film Among the Shadows (Momentum Pictures, 2019) was also released in some markets as The Shadow Within and it's not known what prompted the change (although there was a film in 2007 called The Shadow Within).  Given the two titles under which the film was distributed have quite different meanings, presumably either the title is incidental to the content or equally applicable.  A dark and gloomy piece about murderous werewolves and EU politicians (two quite frightening species), perhaps both work well and no reviewer appears to have commented on the matter and given the tone of the reviews, it seems unlikely there'll be a sequel to resolve things.

Cameo

Cameo (pronounced kam-ee-oh)

(1) A technique of engraving upon a gem or other stone, as onyx, in such a way that an underlying stone of one color is exposed as a background for a low-relief design of another color.

(2) A gem or other stone so engraved; a medallion, as on a brooch or ring, with a profile head carved in relief

(3) A literary sketch, small dramatic scene, or the like, that effectively presents or depicts its subject.

(4) As "cameo, "cameo role" or "cameo appearance", a minor part played by a prominent performer in a single scene of a production, originally un-credited yet deliberately obvious (a la Alfred Hitchcock (1899–1980)).  In modern use, the sense has extended to any brief appearance, credited or not.

(5) In commercial use, a color of creamy neutral ivory, the name an allusion to the hue most associated with the jewelry.

(6) The industry slang for "cameo lighting", a technique used on stage or set usually by restricting the output of a spotlight to a narrower beam and the reverse effect of "silhouette lighting" (a complementary chiaroscuro technique).  

1375–1425: From the Italian cam(m)eo from the Old French camaieu, of uncertain origin; replacing late Middle English camew & cameu both direct borrowings from the Old French.  The ultimate root is held usually to be the Medieval Latin cammaeus (later camaeus), of unknown origin but both the Arabic qamaa'il (flower buds) and the Persian chumahan (agate) have been suggested as the source.  Cameo is a noun & verb and cameoed & cameoing are verbs; the noun plural is cameos or cameoes.

In the early fifteenth century, kaadmaheu, camew, chamehieux and many other spellings, all from the early thirteenth century in Anglo-Latin circulated, all meaning "engraving in relief upon a precious stone with two layers of colors" (such as onyx, agate, or shell and done so as to utilize the effect of the colors).  These fell soon from use as the words derived from the Medieval Latin cammaeus and the Old French camaieu prevailed.  By the nineteenth century, use extended to other raised, carved work on a miniature scale.  The transferred sense of "small character or part that stands out from other minor parts" in a plays etc is from 1928, a derivation from the earlier meaning "short literary sketch or portrait", first noted in 1851, a transferred sense from cameo silhouettes.  A cameotype was a small, vignette daguerreotype mounted in a jeweled setting, the first examples of which were produced in 1864.

Cameo & Silhouette

A classic, simple silhouette (left), a nineteenth century hardstone cameo in 18 karat yellow gold in the mid-nineteenth century Etruscan Revival style (centre) and a  silhouette with the detailing which became popular in the late 1700s (right).

As artistic representations, there's obviously some overlap between a silhouette and a cameo but they are different forms.  A silhouette is inherently a two dimensional rendering of a shape (typically a portrait but they can be of any scene or object) which classically were simple and of a solid colour (usually black) on a contrasting (usually white or cream) background.  Originally, there was no detailing of features but that soon became common.  Silhouette portraits were highly popular in the eighteenth & nineteenth centuries and the form was especially popular with untrained (indeed unskilled) amateurs because of the cheapness and simplicity of the form, a finished work requiring little more than two sheets of paper (black & white), a pair of scissors and a pot of glue.  A cameo differs in that it is three-dimensional, an embossed or raised piece, usually in relief.  The most prized antique cameos are those engraved on semi-precious gemstones, agate, forms of onyx, shells and lava but in modern use synthetic materials are not uncommon and, being small and able to be rendered in a single piece, can be 3D printed although the quality of these doesn’t (yet) match something hand-carved.

Cameo.com

Launched in March 2017, cameo.com is a US-based distribution & content-sharing website, its niche being a platform on which celebrities and others can sell personalized video messages to fans or anyone else prepared to pay, the site claiming more than thirty-thousand sources are available.  The price per clip is said to extend from US$5 to US$3000 and operates as a dynamic supply and demand curve, the price said to rise or fall in response to elasticity in demand, all determined by an AI algorithm which is predictive (able to anticipate a rise in demand and adjust prices accordingly).

For US$400 (or US$20 for a DM), one can receive a personalized video message from Lindsay Lohan.  The service limits the text to two-hundred and fifty (250) characters so economy of language is encouraged.  The client is able to request the theme and possible topics might include relationship counselling, fashion advice, career management & international relations.  In most cases, it seems not necessary to approach this with undue urgency, many of the celebrities available on Cameo.com "for a limited time!" have been listed for some years.

Lindsay Lohan at the Mean Girls (2024) premiere, New York, January 2024.

Lindsay Lohan’s cameo in the 2024 (musical) re-make of Mean Girls (2004) attracted comment for a number of reasons but what most impressed many was the fee, reported by entertainment industry magazine Variety as US$500,000.  While that sum is unverified, what has been confirmed is that her cameo (in the math competition scene) required four hours on set; given the simplicity of the math, Variety didn’t bother printing its calculation of the hourly rate but given the 2004 production was shot over three months for which Ms Lohan was paid a reputed US$1 million, it’s clear inflation alone doesn’t account for the differential.  Still, any commodity is worth only what a buyer is prepared to pay and it’s a specialized supply & demand curve because there’s only one Lindsay Lohan.