Frank J. Reilly taught head construction at the Art Students League of New York for over thirty years. His system is not about measurement — it is about three rhythm chains that carry the head's motion before any feature is drawn. The hairline curve, the cheek-and-jaw curve, the brow-and-mouth curve. Get those three lines right and the portrait has gesture before it has likeness. Get them wrong and no amount of anatomical accuracy will save it. This is the working artist's pillar on how Reilly's system is built, where it came from, and how it differs from Loomis and Bridgman.
Frank Joseph Reilly was born in New York in 1898 and trained at the Art Students League under Frank V. DuMond, who was himself a student of Jules-Joseph Lefebvre and Gustave-Rodolphe Boulanger at the Académie Julian in Paris during the 1880s.1 The line back through DuMond to Lefebvre is what made Reilly's teaching feel French even though he never left the United States — the rhythm-line approach has its analog in the École des Beaux-Arts technique of la mise en place, the placing of the head's larger movement before its details.
Reilly began teaching at the League around 1935 and became one of its most influential instructors, eventually heading the portrait and figure department.2 Between 1935 and his death in 1967 he trained a generation of working portrait painters and illustrators. Frank Mason continued the tradition at the League and refined the rhythm-line teaching for a longer time horizon than Reilly's own classes had allowed. Daniel Greene took the system into pastel and became one of America's most commercially successful portrait painters of the second half of the twentieth century.3 Pruett Carter applied parallel rhythm thinking to magazine illustration; though Carter and Reilly were peers rather than student and teacher, the language they shared shows in their lecture notes.4
The Reilly tradition is unusual among twentieth-century drawing methods because it was almost entirely transmitted through teaching rather than print. Reilly published no instructional book — when people ask whether Reilly wrote a book, the honest answer is no, not in his lifetime. His method survives in the form of student notes, handouts photocopied across generations of classes, the demonstration drawings preserved by the League, and the published record of students such as Jack Faragasso, whose own teaching documents the rhythm system in print.5 The rhythm-chain construction is also widely called the "Reilly abstraction" — the abstracted scaffold of curves that sits beneath a finished portrait. Frank Mason eventually compiled a manual of Reilly's approach posthumously, but the most reliable accounts of what Reilly actually taught come from his living students' own teaching: Greene's instructional books, Robert Beverly Hale's parallel teaching at the League, and the late-career interviews where Reilly's students described his classroom in detail.6
Reilly's classes were known for two things. First, he required Bridgman before he would teach you anything. George Bridgman had taught Constructive Anatomy at the League from 1894 until his death in 1943, and Reilly considered Bridgman's analysis of the skeleton non-negotiable groundwork for portrait drawing.7 Second, Reilly insisted that the rhythm chains be drawn before the features. Many of his demonstrations exist as drawings where the eyes, nose, and mouth are barely indicated while the cheek-and-jaw rhythm is fully resolved. The teaching point was that a head whose rhythm is wrong cannot be saved by accurate features, but a head whose rhythm is right reads as a portrait even when the features are summary.
The list of artists who passed through Reilly's classes is long enough that the method's modern reputation outruns the documented record. Andrew Loomis is sometimes called a Reilly student, but Loomis was Reilly's senior by six years and trained earlier. Norman Rockwell knew the League circle but trained elsewhere. The verifiable Reilly students who became influential in their own right include Daniel Greene, Frank Mason, Burton Silverman, and David A. Leffel — a roster that defines what twentieth-century American figurative painting looked like at its high end.8
Reilly's central technical insight is that a head reads as a continuous flowing object rather than a collection of features. The eye does not, in the act of recognising a face, register the corners of the mouth before the line of the cheek; it sees the whole sweep of the side of the face and the features fall into place along it. To draw a head as the eye sees it, you must place the sweep first.
Reilly's three rhythm chains describe the three dominant sweeps. They are anatomical only in that they correspond loosely to underlying structures; their job is to plan motion, not to map bone. The chains, in the order Reilly taught them, are:
This first chain runs from the centre of the forehead, out across the temple, down the side of the head, and into the start of the ear. It is one continuous flowing curve and it sets the top half of the head's gesture. If the sitter is tilted forward, this chain dips at the centre and rises at the sides. If the sitter is tilted back, it does the reverse. In a three-quarter view the chain becomes asymmetric — longer on the far side, foreshortened on the near side — and the asymmetry is the first thing the eye reads when it identifies a head as turned.
This second chain is the most important. It runs from the temple, down through the zygomatic arch (the cheekbone), across the cheek, and into the line of the jaw. In Reilly's notes this chain is drawn as a single sweep, never broken at the cheekbone. The point is that the side of the face is one rhythm — the cheek and the jaw are not two separate features but two phases of the same curve. Reilly's demonstrations spend more time on this chain than on the other two combined.9
The third "chain" is really a pair of cross-axis curves: the brow ridge above and the line of the mouth below. Together they establish the head's tilt across its width. In a head that reads as turned slightly to one side, the brow and mouth curves are not parallel — the brow tips one way and the mouth tips the other, mirroring the cross-axis rotation that the cheek-and-jaw chain has already established. When all three rhythms agree, the head reads as solid in space before any feature has been resolved.
The front-view construction is the entry point. Reilly taught front view before three-quarter for a specific reason: front view forces you to deal with the symmetry of the rhythm chains before you deal with their asymmetry. If you cannot get the hairline curve to mirror itself across the central axis, you have no business attempting a three-quarter view where one side becomes longer than the other.
Start with a vertical axis and a horizontal eye-line at the head's halfway point — this much is shared with the Loomis method.10 Then place the hairline curve as a single sweep across the top of the cranium. Do not draw the features yet. Place the cheek-and-jaw chain on both sides, ensuring they are reflections of each other; if they are not, the head will read as warped no matter how accurate the features turn out. Place the brow ridge and mouth line last, both horizontal in a true front view.
Open the Reilly head overlay and place it over a front-view reference photo. The three rhythm chains are pre-drawn as guides. Drag the overlay's anchor points to match the sitter's hairline, cheek, and brow positions. The overlay's chain-curvature controls let you adjust each rhythm independently — useful for sitters with strong jawlines or unusually high foreheads.
Open the Reilly overlay (front view) →The most common failure mode at this stage is over-precision. Beginners want the cheek-and-jaw chain to be anatomically correct on the first pass. Reilly's instruction was the opposite — get the chain moving correctly first, then refine its precise path. A head with rhythms that are slightly inaccurate but flowing reads as a portrait. A head with rhythms that are accurate but stiff reads as a diagram of a face.
The three-quarter view is where the Reilly system earns its reputation. In a turned head, the three rhythm chains all become asymmetric, and their asymmetry must agree. If the hairline curve favours the left and the cheek-and-jaw chain favours the right, the head will not read as turned — it will read as broken.
Reilly's procedure for the three-quarter is to commit to the cheek-and-jaw chain first, before placing any vertical axis. This is counterintuitive — most other systems (Loomis, Bridgman, the Bargue-derived atelier method) build the underlying volume before placing surface lines. Reilly's logic was that in a three-quarter view, the cheek-and-jaw chain is the volume. The side of the face describes the foreshortening more directly than any constructed sphere can.11
Once the cheek-and-jaw chain is committed to, the far side of the face can be sketched in as a shorter, foreshortened version of the same rhythm. The hairline chain follows: longer on the far side, sharply shortened on the near side. The cross-axis (brow and mouth) tilts in the direction of the turn — a head turned to its own right tips the brow slightly up on the viewer's right side and the mouth slightly down on the viewer's right side, completing the cross-axis rotation.
The Reilly overlay's three-quarter mode shows both the near-side and far-side rhythm chains. Study each chain in turn — and notice that the far-side cheek-and-jaw chain can drop away entirely and the head still reads as turned, because the near-side chain carries all the rotational information by itself.
Open the Reilly overlay (3/4 view) →Reilly considered profile the hardest of the three views to teach, which is paradoxical because profile is often the first view a beginning student attempts. The reason: in profile, two of the three rhythm chains collapse onto the silhouette. The cheek-and-jaw chain is no longer a side-of-the-face rhythm — it has become the visible contour of the face itself. The brow-and-mouth pair are seen edge-on. Only the hairline chain remains as an interior line.
This means profile drawing concentrates all the information that was previously distributed across three rhythm chains into a single silhouette curve. Get that silhouette curve wrong by even a few degrees of forehead slope or jaw projection, and the entire likeness is gone. There is no rhythm to compensate with. Reilly's instruction for profile was therefore to slow down by an order of magnitude — to spend on the silhouette curve the same effort that would otherwise be spent on three separate rhythms.12
The profile view is also where the Loomis ball-and-plane construction becomes most useful as a check on Reilly. The Loomis sphere with its sliced-off planes establishes the cranium's volume independently of the silhouette, and the constructed jaw drops from the sphere along an anatomical hinge. If your profile silhouette disagrees with the Loomis-constructed volume, the silhouette is probably wrong. This is one of several places where the two systems pair productively rather than conflict.
Reilly's published focus was the head, but his rhythm logic extends to the whole figure with very little adjustment. Frank Mason and Glenn Vilppu both teach figure construction using the same rhythm-chain language: a torso has a shoulder-to-hip rhythm, a limb has a shoulder-to-elbow-to-wrist rhythm, and the figure as a whole has a head-to-feet line-of-action which is itself a single Reilly-style chain.13
The translation is mechanical. Wherever you would have asked "what is the rhythm of this side of the face," you now ask "what is the rhythm of this side of the torso." The cheek-and-jaw chain becomes the latissimus-to-external-oblique sweep on the side of the trunk. The hairline chain becomes the deltoid-to-trapezius curve across the top of the shoulders. The cross-axis brow-and-mouth becomes the shoulder line and the pelvic line, tilted against each other to register weight-shift.
For Grid Maker Pro overlay use: the same Reilly head overlay used for portrait construction can be applied to a full figure reference if you treat it as planning the head specifically. For figure-level rhythm, use the line-of-action overlay paired with the major-rhythm-chains overlay. The two are designed to be stacked.
In the tool, activate the Reilly head overlay and the figure rhythm overlay simultaneously. They will appear in separate colours so you can see how the head's rhythms continue into the neck and shoulders. The point is to plan the head as part of the figure, not as a separate object dropped on top of a body.
Stack both overlays →The three big American head-construction systems of the twentieth century all came out of the same Art Students League milieu — Bridgman taught there until 1943, Reilly from the 1930s until 1967, and Loomis (who never taught at the League) developed his system in parallel as a working illustrator with significant ASL influence. Their relationship is collaborative, not competitive, but the three methods ask for different first marks on the page.
| Method | First mark on the page | Strongest at | Weakest at | Pair it with |
|---|---|---|---|---|
| Reilly | The cheek-and-jaw rhythm chain | Likeness from motion; portrait painting from life | Anatomical teaching of underlying skull | Bridgman for prerequisite anatomy; Loomis for profile checks |
| Loomis | The cranial sphere with sliced planes | Constructed volume; foreshortening; teaching the head as a 3D object | Likeness; sitter's individual character | Reilly for surface rhythm after volume is set |
| Bridgman | The skull's bony landmarks | Anatomical accuracy; understanding underlying structure | Surface drawing; speed; portrait gesture | Reilly or Loomis on top of Bridgman's foundation |
The atelier-method consensus, as practised at Watts Atelier, the Florence Academy of Art, and most American academic studios in the 2020s, is to teach the three in sequence: Bridgman first (the skeleton you must know), then Loomis (the volume you must constructed), then Reilly (the surface rhythm that turns a constructed head into a portrait).14 Working portrait painters typically end up using all three simultaneously without thinking about which is which — Bridgman for the bone they cannot see, Loomis for the volume they are turning, Reilly for the curve they are committing to on the page.
The system's originator. Trained under DuMond; taught the head, portrait, and figure departments at the League for over thirty years. Left no published book; his teaching survives through student notes and the work of his students.
Reilly's direct successor at the League. Taught the rhythm-chain system to multiple generations of students including the founders of Florence Academy of Art and several contemporary atelier instructors. Compiled the most-cited Reilly course manual.15
Reilly's most commercially successful student. Painted portraits of two US presidents, three Speakers of the House, and dozens of corporate boardroom commissions. His instructional books document the Reilly system applied to pastel as well as oil.
Among the last living first-generation Reilly students. Continues to teach and paint in New York; his work has been collected by the Metropolitan Museum of Art and the National Portrait Gallery. Demonstrably uses the rhythm-chain construction in his preparatory drawings.
The most visible contemporary transmitter of Reilly-tradition red-chalk demonstrations. Liberace's workshop demos can be reverse-engineered as the three rhythm chains drawn in sanguine before any feature is committed to.
Trained under Reilly's circle at the League before moving into animation. His Vilppu Drawing Manual (1997) transmits the rhythm-chain logic to a generation of animators and concept artists, expanding the method's reach into film and games.
Reilly's rhythm chains describe motion across the skull, not the skull itself. If you do not know where the zygomatic arch sits, the cheek-and-jaw chain will float free of the bone it should be tracking, and the head will read as soft.
The single most common beginner error. Eyes, nose, and mouth are visually rewarding; rhythm chains are not. The temptation to render an eye before the cheek-and-jaw chain is committed to is almost overwhelming.
Many students draw the cheekbone as one line, lift the pencil, and draw the jaw as another. Reilly insisted on one continuous sweep. The break in the line will read in the finished portrait as a break in the form, no matter how well you blend it in the rendering stage.
A camera lens shorter than ~85mm distorts head proportions and flattens the rhythm chains. A wide-angle selfie has hairline and cheek rhythms that do not exist on the actual sitter's head. Drawing what the photo shows produces a wrong portrait that is technically accurate to the wrong reference.
Some students adopt Reilly as their only head-construction method and reject Loomis volume work or Bridgman anatomy as redundant. They produce portraits with strong surface rhythm but weak underlying form, especially in unusual lighting.
"Reilly taught us to draw the head as one continuous motion, not as a set of separated parts. The features come at the end, almost as an afterthought, because by the time you place them the head already exists on the page. That is the lesson, and it took most of us a decade to understand it."
Daniel Greene, recalled in interview with American Artist magazine (2010)3
Illustrative composites of how the tool gets used in practice — not quotes from named individuals.
I keep the cheek-and-jaw rhythm in my head before I ever pick up the brush. Reilly's gift was teaching me to draw the head with my shoulder, not my fingertips.
For digital portraits, I overlay the Grid Maker Pro Reilly chains on the photo reference layer. Then I sketch on top with the rhythms already committed. It saves me from chasing the photograph.
Reilly is the reason my portraits read as people instead of as anatomy diagrams. The rhythm chains are felt; the measurements are arithmetic. You need both, but in that order.
Drop a portrait reference. The Reilly rhythm chains apply in one click. Free, in your browser, your image never leaves the device.
Launch Grid Maker Pro →One overlay, one historical reference, one workflow note. Studio notes from working artists, photographers, and designers. No spam, unsubscribe in two clicks.
Join 10,000+ artists receiving weekly tips
