portrait photography criteria
These photography criteria are used for burst reads and for portfolio reads when portrait is selected.
Formal criteria from classical portrait practice. Lighter than the street rubric in v0.1 - street is the launch mode; this file primarily proves the rubric architecture generalizes and gives portrait mode a real foundation. Same rules: identical assessment for all users, productive_violation requires stated evidence.
Eye criticality
The near eye is critically sharp with a present catchlight; the eyes anchor the frame's focus hierarchy.
The test: Is the near eye the sharpest element? Is there a catchlight giving the eye life? If focus falls elsewhere, is it a deliberate choice?
Productive violation: Deliberate focus displacement - hands, an object, a veil as the true subject, eyes consciously softened. The alternative focus point must carry the portrait's meaning.
Source: Classical portrait craft; plane-of-focus discipline
Gaze and engagement
The gaze - direct, averted, or internal - is legible and consistent with the portrait's apparent intent, creating a defined relation between sitter and viewer.
The test: Where do the eyes go, and does it read as a choice? Direct gaze: is it engaged or vacant? Averted: does it point at something (in-frame or implied) or merely wander?
Productive violation: Closed eyes or the blink as subject (interiority, refusal). Requires support from expression and light; a caught blink is not a statement.
Source: Portrait tradition; direct vs. averted gaze semantics
Light pattern and quality
The light on the face follows a nameable pattern (or a controlled departure), with quality (hard/soft) and direction modeling the face intentionally.
The test: Name the pattern from shadow placement (nose shadow, cheek triangle, ratio). Is the shadow side controlled? Does light quality match the portrait's register (hard for character, soft for glamour, etc.)?
Productive violation: Anti-pattern light as statement - underlight, silhouette, harsh flash (the on-camera-flash tradition). The 'wrong' light must be consistent and total, not a botched classical setup.
Source: Studio canon: Rembrandt, loop, split, butterfly, broad/short
Background separation and environment
The background either falls away cleanly (separation by focus, tone, or distance) or contributes as environment - context that speaks about the sitter. It never competes.
The test: Does anything behind the sitter pull the eye first? If the background is sharp/present, does it inform the portrait (workplace, home, meaningful clutter) or is it noise?
Productive violation: Subject embedded in chaos as statement (the sitter nearly lost in their environment). The embedding must be composed, with the sitter findable by light or geometry.
Source: Environmental portrait tradition; subject-ground hierarchy
Pose and hands
Posture and especially hands look natural and intentional: angles flattering or characterful by choice, hands relaxed and expressive, no accidental foreshortening or claw tension.
The test: Check spine/shoulder line, head-neck angle, and both hands. Do hands add (gesture, prop, rest) or distract (tense, mashed, amputated by crop)? Does foreshortening serve or distort?
Productive violation: Deliberate awkwardness (the stiff frontal pose in the August Sander lineage; discomfort as honesty). Requires consistency of register across the frame.
Source: Classical posing craft
Expression authenticity
The expression reads as a caught truth rather than a held mask - micro-expression, the moment between poses, an emotion with depth.
The test: Does the face look performed-for-camera or inhabited? Are eyes and mouth telling the same story? Would the sitter recognize themselves?
Productive violation: The mask as subject - formal blankness interrogating the act of portraiture itself (Sander, Avedon's later work). The blankness must be rigorous and sustained by the formal treatment.
Source: Portrait tradition; the mask vs. the moment
Crop discipline
Crops fall at strong points (mid-thigh, waist, mid-torso, tight face) and never at joints (knees, elbows, ankles, wrists, neck).
The test: Where do the frame edges intersect the body? Any joint cuts? Headroom proportionate to the crop's tightness?
Productive violation: Radical crops (half-face, body fragment) as formal statement. Must be decisive - centimeters past a joint reads as error; far past it reads as choice.
Source: Classical crop points; joint-amputation avoidance
Tonal and skin rendering
Skin holds detail and natural gradation: highlights not blown on the face, shadow side retaining structure, color (if color) free of casts that fight the subject.
The test: Check the brightest facial highlight and deepest facial shadow for retained detail. In color: any cast (mixed light, bounce) on skin that reads as fault rather than atmosphere?
Productive violation: High-key blowout or heavy cast as register (overexposed fashion lineage, monochrome color treatments). Must be total and consistent, not localized failure.
Source: Print tradition; skin as the portrait's tonal anchor
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