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Studio Lighting Setups for PhotoRobot Sessions

Three-point lighting is the canonical structure for static product photography. PhotoRobot reality starts at four lights — two on the subject, two on the background — because clean software background removal is part of the deliverable. From there, real PhotoRobot capture scales up: six lights for glass and transparent products, eight or more for large turntables and automotive sessions, plus specialty techniques for tents, stainless metals, deep-zoom sharpness, and non-stop synchronised capture. This manual covers the foundation + the PhotoRobot-specific architecture that builds on it.

Part of the Lighting Techniques reference library.

§1 — The minimum: one light + a reflector

A good photographer can make a clean product image with one well-placed continuous light + a white reflector card opposite. The light provides directional illumination; the reflector bounces some of that light back as fill. This is the minimum viable lighting setup — it’s how product photographers shoot when on location with no studio infrastructure, and it remains the reference for “what is fundamentally possible with disciplined eye + careful placement.”

This foundation matters for PhotoRobot operators for two reasons:

  1. Calibration baseline. When evaluating a candidate fixture, modifier, or position, ask first: “Does this give me what the one-light-plus-reflector would give, or am I adding fixtures because they solve a real problem?” The answer separates valuable lighting investment from cluttered setups.
  2. Backup workflow. When equipment fails mid-session and a customer deliverable is due, falling back to one light + reflector + careful operator eye is often better than continuing with a broken multi-light setup. The minimum keeps shoots alive.

But for production PhotoRobot capture — repeatable, multi-camera, software-integrated — one light isn’t enough. The standard expands.

§2 — Three-point lighting: the universal product-photography standard

The classical three-point structure is the next step up + the model most general-purpose product photography texts cover:

2.1 — Key light

Position: 30–60° from camera axis, slightly elevated, modified per desired character (soft = larger modifier; hard = smaller / no modifier; defaults to medium-soft for product photography).

Key light is typically the brightest fixture. It defines where shadows fall + reads as the “primary lighting direction” to the viewer.

2.2 — Fill light

Position: opposite side from key, similar height, often farther distance (because fill should be dimmer than key).

Key-to-fill ratio controls contrast. Default for product work: 3:1 or 4:1. Higher (8:1+) for dramatic; lower (2:1) for soft / catalog-friendly.

Fill can also be passive — a white reflector card bouncing key light back, no separate fixture needed. Cheaper, controllable, sufficient for low-contrast situations.

2.3 — Back light

Position: behind the subject, slightly off-axis from camera, aimed down at subject’s back.

Creates rim highlight along subject contour for separation from background. Brightness: similar to key, less than fill. Modification: medium-hard for clean separation, softer for organic feel.

2.4 — Why three-point works as a model

Three-point produces well-illuminated subjects with dimensional rendering. The structure scales — different products, different aesthetics, different studios all map onto the three-role framework with adjustments to position, brightness, and modifier choice. Operators who understand three-point can articulate any lighting setup in terms of “what role does each fixture play” — useful for diagnosis when something’s off.

For static product photography, three-point is sufficient. For PhotoRobot rotation-based capture with software background removal, it’s the starting point, not the destination.

§3 — Three-point as foundation, not destination

Three-point lighting is designed for static subjects with uncontrolled backgrounds and a photographer in the room. PhotoRobot capture inverts all three:

  1. Subjects rotate. A key light at +45° serves the subject at one rotation position; at the opposite rotation position, the same light is now behind the subject (effectively a back light). The lighting design must work across the full rotation, not just for one frame.

  2. Backgrounds will be removed software-side. The deliverable typically isn’t “subject on this background” — it’s the subject on whatever background the customer’s downstream pipeline drops it onto (e-commerce white, branded scene, AR / 3D viewer). Background removal needs clean, even, controllable background illumination that lets the software cut the subject out cleanly.

  3. No photographer manipulating lights during production. Classical photography assumes a photographer who repositions fixtures, swaps modifiers, adjusts distances per subject. PhotoRobot studios run without that — operator’s job is sample handling + capture triggering, not lighting choreography per item.

3.1 — The robotic-photography lighting inversion

The third point is the most consequential — and the most easily misread by operators coming from classical photography backgrounds. Read carefully:

In classical photography: fewer lights + photographer manipulation = flexible setup. The photographer is the variable; lights are tools the photographer wields per shot.

In PhotoRobot photography: more fixed lights + software intensity control = flexible setup. Lights are bolted in once, never touched again. Software intensity presets per product group (saved CAPP scopes) are the variable; lights are the standing infrastructure.

This inverts almost every “fewer is better” intuition from classical photography. In a PhotoRobot studio:

This reframing matters because the rest of this manual (§4 four-light, §5 six-light, §6 eight+, §7 automotive showroom) describes scaling-up patterns. Each scale-up is not “more setup work” — it’s more software flexibility for free (after one-time install + calibration). PhotoRobot capture therefore adds dedicated background lighting as a non-negotiable element + tends toward more fixtures than classical photography would suggest for the same subject category. The minimum production setup isn’t three-point. It’s four. And six, eight, twelve are not “creeping complexity” — they’re “more presets the studio can serve well.”

3.2 — When fewer lights is the right call

Two cases where small fixture counts make sense:

For most permanent PhotoRobot studio installations: the right fixture count is the count that lets the studio serve every customer product category through software-only switching, not the count that handles “the average product” with manual help.

§4 — The PhotoRobot baseline: four-light setup

For most standard PhotoRobot product captures, the canonical setup is:

                 [Subject light 1 — main]   [Subject light 2 — fill / opposite]
                            ↓                            ↓
                            └──────── Subject ──────────┘
                                          ↑
                                 (on rotating turntable)
                                          ↑
                            ┌─── Background ─────────────┐
                            ↑                            ↑
                  [Background light 1]        [Background light 2]

4.1 — Two on the subject

Two fixtures provide directional coverage that adapts reasonably as the subject rotates. Compared to a single subject light:

For most product photography on PhotoRobot, the two subject lights are similar intensity (1:1 or close) with one slightly more directional + one softer for fill character.

4.2 — Two on the background

This is what distinguishes PhotoRobot setup from generic three-point. Two fixtures aimed at the background (cyclorama, white sweep, or other backdrop):

4.3 — The “light wrap” effect — why you don’t over-light the background

A critical anti-pattern: background over-illuminated relative to subject causes the background’s brightness to bleed into the subject’s edges. This is called light wrap, and on the captured image it presents as:

The fix is to keep background brightness controlled — bright enough for clean keying (typically the background should read as the dominant tone but not pure white), not so bright that it overwhelms the subject’s edges.

Default ratio: background ~⅔ to ¾ as bright as the main subject light, measured at the subject position. Adjust per product (highly reflective subjects need less background bleed than matte subjects).

4.4 — When four lights is the right setup

Four-light is the baseline assumption for PhotoRobot capture. Operators who set up three lights “because that’s what three-point says” leave the keying step under-prepared; operators who set up six or eight without need over-engineer + create operational drag.

§5 — The six-light setup: glass, transparent products, internal-volume captures

Some products need more than four lights to capture cleanly. The first scale-up is to six.

5.1 — The problem: 90° camera elevation + internal volume

When the camera rises to a near-90° elevation (looking down at the subject) — common for product hero shots that include top-view detail — products with internal volume show darkness inside:

Standard four-light setup doesn’t reach into these cavities — both subject lights are positioned to illuminate the outside of the product at side angles, leaving the interior in shadow.

5.2 — The solution: top light + (sometimes) bottom light

Adding lights at top and bottom positions:

                          [Top light — fills interior cavities]
                                        ↓
                                        ↓
              [Subject 1]──── Subject (on turntable) ────[Subject 2]
                                        ↑
                                        ↑
                 [Background 1]   [Background 2]
                                        ↑
                                        ↑
                        [Bottom light — when subject sits on glass]

Top light illuminates interiors visible from elevated camera angles. Position: directly above subject, modified for soft coverage (avoiding hot spots on top surfaces).

Bottom light is needed when the subject sits on a glass table or transparent surface:

Together, six lights handle: external coverage (2 subject + 2 background) + interior illumination (top) + bottom shadow control / underside lighting (bottom).

5.3 — When six lights is the right setup

5.4 — Six-light as set-and-forget standard

Per §3.1 robotic-photography inversion: six lights mounted in fixed positions is the right baseline for any studio expecting to serve multiple product categories — even if the studio’s first customer doesn’t use the top + bottom fixtures.

Reason: software-side preset switching (CAPP scopes) handles per-product variation without any physical adjustment. A studio that bolts in six lights initially can:

A studio that bolts in only 4 lights initially saves upfront cost but pays for it later if:

The classical-photography intuition “don’t buy lights you don’t need yet” is correct when the photographer can manually add them per shoot. In PhotoRobot, fixtures are infrastructure — easier to install once with margin for future use than to retrofit.

Operator’s bias should be toward 6-light minimum for new permanent installations, not 4-light minimum. The marginal cost of 2 extra fixtures + their installation is small relative to the operational flexibility they unlock + the retrofit cost they avoid.

When 4-light is genuinely the right choice:

§6 — Eight or more lights: large turntables, large subjects

PhotoRobot’s larger workstations — Carousel 3000 / 5000 for carpets + automotive + heavy products, Frame for oversize objects, large turntable installations for furniture / appliances — typically need eight or more lights.

Per §3.1 robotic-photography inversion: eight or more is not “creeping complexity” — it’s the count that lets the studio’s CAPP scopes serve every product category cleanly without physical re-rigging. Strobe sync, power packs, mounting infrastructure all scale up once at installation; per-session work scales down to “pick the right CAPP scope.”

6.1 — Why large platform + background = many fixtures (not “is the problem”)

The Carousel 3000 has a 2.8 m diameter rotating plate. The Carousel 5000 is 5 m. The background (cyclorama) wraps behind, typically 3–5 m wide. The transition zone between the plate edge and the cyclorama is the critical region for clean software background removal — and the larger the workstation, the larger that transition zone.

With four background lights, the transition zone can have:

The fix: more background fixtures, distributed for even illumination across the full transition zone, often with localised over-illumination at specific transition points to ensure clean keying everywhere.

6.2 — Why large background needs many fixtures (physics, not preference)

A 3.5 m wide cyclorama can’t be evenly lit with one or two fixtures from a reasonable distance — light falloff (inverse-square law) makes the centre much brighter than the edges. Multiple fixtures distributed along the cyclorama length give homogeneous coverage at the brightness the software keying algorithm expects.

Typical large-turntable setup: 4 background fixtures + 4 subject fixtures = 8 lights baseline, mounted in fixed positions once + scaled higher for very large subjects. CAPP scopes per customer / per product group activate the right subset at the right intensity for each session.

6.3 — Why large subjects need distributed subject lighting

A car, an industrial machine, a piece of furniture — these subjects can be 2+ meters in any dimension. Two subject lights can’t evenly illuminate that surface area without creating hot spots near the lights + dark zones at the extremes.

Solution: multiple subject fixtures distributed around the subject perimeter, each contributing to overall coverage. For automotive (covered in §7), eight or more fixtures is standard — and once installed + calibrated, every car / car-category capture session reuses the same fixed installation with only CAPP scope variation.

6.4 — Synchronisation: install-time engineering, not per-session overhead

With eight or twelve fixtures, strobe sync requires more sophisticated infrastructure than with four — fixtures fire simultaneously within microseconds, power packs recharge in time for the next capture cycle, single-fixture failure must be detected so the operator knows to investigate. This is install-time engineering — done once at studio commissioning + verified periodically.

PhotoRobot installations with high fixture count typically use:

Per the §3.1 inversion: this is install-time complexity that buys session-time simplicity. After commissioning, the operator’s interaction with the eight-fixture rig is identical to interaction with the four-fixture rig — select CAPP scope, trigger capture sequence, CAPP orchestrates fixtures + cameras + rotation. Operators don’t need to think about which of the eight fixtures fires at what power for each capture; the saved scope handles it.

Studios scaling up fixture count (e.g., from 4-light initial install to 8-light upgrade after adding automotive customer) should plan install + scope calibration as a Hardware Specialist + Studio Manager engagement rather than improvising during a busy production week. Get the install right + the scopes calibrated; production sessions then inherit the work cleanly.

§7 — Carousel 5000 / automotive lighting: the showroom approach

Photographing cars (and similar large reflective subjects — boats, motorcycles, heavy machinery with painted surfaces) on the Carousel 5000 is its own discipline. Two common anti-patterns dominate the bad approaches:

7.1 — Anti-pattern A: the gigantic softbox attempt

Some studios try to recreate magazine-shoot automotive lighting — a giant overhead softbox + negfill cards + reflectors carefully positioned for a single hero angle. This works for a stationary car shot by an experienced commercial automotive photographer.

It fails for PhotoRobot capture because:

7.2 — Anti-pattern B: white tent / white room

Some studios resort to enclosing the car in a white tent or photographing in a white-painted room, reasoning that “diffuse white surroundings = soft lighting that works at any rotation angle.”

This fails for reflective subjects because:

7.3 — The PhotoRobot approach: showroom lighting

The right model for automotive (and other reflective subjects) is the car showroom — a dealership floor where new vehicles are presented under purpose-designed lighting — or, scaled down, the main-street jewelry-store window display. Both share the same principle: polished + reflective surfaces (car paint, chrome, watch cases, polished gold + silver) are presented under controlled directional lighting that gives the eye exactly the reflection pattern it expects from a premium product.

Showroom lighting characteristics:

The viewer’s eye reads the resulting image as a car in a premium showroom — or a watch in a jewelry-store window — exactly the emotional response a dealer (or used-car platform, or rental fleet, or auction site, or e-commerce jewelry retailer) wants from the imagery.

7.4 — The reflection-control discipline

The principle: the eye knows a surface is reflective because it reflects something. What it reflects determines how the surface reads.

PhotoRobot’s automotive setups are designed for the first case. Studios trying to short-cut into showroom-grade output with tent / room approaches end up in the third case.

7.5 — Application beyond cars

The showroom-lighting discipline applies to many other categories. Both car-showroom and jewelry-window mental models work depending on subject scale:

Whenever the subject has substantial reflective or refractive surface area + the deliverable demands premium positioning, pick the analogue (car-showroom for vehicle-scale, jewelry-window for desk-scale) + recreate its lighting discipline at PhotoRobot studio scale. Both share the same controlled-directional-reflection principle; subject scale determines which mental model is easier to translate.

PhotoRobot CPQ configurations for large-subject installations include the lighting kit recommendations matched to subject category. Studio Manager engagement scoping should incorporate the showroom-lighting principle into customer conversations + budget planning.

§8 — Light tent (lightbox) sessions

PhotoRobot supplies light tents (lightboxes) as part of compact-subject capture configurations — particularly for jewelry, small accessories, cosmetics, small electronics. Tents provide enclosed diffuse environment that simplifies lighting setup compared to open-studio capture.

8.1 — The default failure mode: flat, characterless captures

A naked light tent — pure white walls, lights from outside diffusing through the tent fabric — produces flat, uniform, characterless captures. The subject reads as “well-lit but boring” — no dimension, no surface character, no visual interest.

This is the lightbox cliché: every direction lit equally, every shadow softened to invisibility, every reflective surface picking up only milky white. Acceptable for utilitarian catalog work; insufficient for premium positioning.

8.2 — The fix: non-diffuse contrast panels inside the tent

The solution: place black or white non-diffuse panels inside the tent at strategic positions to give the subject kresba (“drawing” — visual definition).

The contrast between diffuse (tent fabric) and non-diffuse (panels) elements is what gives the captured subject its visual interest. Pure diffuse = flat; pure non-diffuse = harsh; mixed = dimensional.

8.3 — Application

For jewelry sessions in a light tent:

The result: the jewelry has dimension, sparkle, surface character — not the flat cliché-lightbox look.

For cosmetics with reflective packaging:

For metallic small products (cutlery, polished accessories — see §9):

§9 — Stainless steel + metallic product techniques

Stainless steel + polished metals + reflective surfaces in general are notoriously difficult to photograph. Standard lighting + standard reflective-surface principles don’t carry it — these surfaces need gradient lighting that gives them surface character.

9.1 — The problem: stainless reads as silver-grey only

Without careful lighting, stainless steel cutlery, kettles, plates, polished kitchen items capture as uniform grey — no character, no surface variation, looks like plastic from a Soviet 1970s catalog.

The eye recognises stainless as stainless because of the way light gradients across the surface. A kettle surface has bright + dark zones in a specific pattern that says “stainless steel” to the viewer. Lighting that produces uniform grey without that gradient pattern destroys the material reading.

9.2 — The technique: photographic paper at angle + gradient illumination

The professional technique for stainless:

  1. Place a large piece of photographic paper (smooth white paper, large enough to dominate the reflective surface’s field of view) at an angle above + slightly to one side of the subject
  2. Shine a directional light through or onto the paper at an angle that creates a gradient across the paper surface — bright on one side, fading to darker on the other
  3. The reflective subject reflects this gradient back — its surface shows the smooth light-to-dark gradient as a characteristic stainless-steel sheen
  4. Adjust paper position + angle + light angle to position the gradient where it best reads on the subject’s most-visible surface area

The captured image now shows stainless that reads as stainless — gradient sheen, dimensional character, premium feel.

9.3 — Variations

9.4 — Application

For any product where stainless / polished metal is a significant surface area, the paper-gradient technique applied in some form is the discipline.

§10 — Deep zoom + high aperture: the sharpness requirement

A distinctive PhotoRobot capability is deep zoom in the customer’s viewer — end-customers can zoom into the captured image and inspect detail at high magnification. This features prominently in product comparison shopping, premium positioning, technical sales.

Deep zoom imposes a specific lighting requirement: every part of the subject must be sharp.

10.1 — Why every part must be sharp

A typical product image at standard resolution can look fine even with parts of the subject slightly out of focus — viewers don’t see the focus issue at the size they view the image. Deep zoom changes this: the viewer can zoom into any region of the subject + inspect it at pixel-peeping resolution. Any soft region becomes immediately visible.

A camera lens has a depth of field (DoF) — the range of distances from the camera at which the subject is acceptably sharp. The DoF depends on:

For PhotoRobot capture with deep zoom requirement, the DoF must cover the entire subject diagonal + buffer for safety margin — front of subject to back of subject, front of subject to top of subject, with both ends acceptably sharp.

10.2 — The solution: high aperture (small f-number? — no, large f-number)

To get deep DoF: use a small aperture (large f-number) — typically f/11, f/14, f/16, sometimes higher for very large subjects.

PhotoRobot provides a DoF calculator + table at photorobot.com (cross-reference in product manuals + Hardware Specialist track). Operators planning a session can calculate the required aperture from subject diagonal + camera distance + lens focal length, then set the camera accordingly.

10.3 — The trade-offs: aperture vs light vs ISO vs shutter

High aperture costs light. The smaller the aperture, the less light reaches the sensor per unit time. To compensate, the operator has three options:

  1. More light — higher-power fixtures, more fixtures, closer fixture positioning, more efficient modifiers. Cleanest solution for sensor noise; most expensive in equipment investment.
  2. Higher ISO — sensor amplification. Increases noise (grain in shadows, colour shift); modern cameras can handle moderate ISO (800–1600) cleanly; higher ISO (3200+) introduces visible noise.
  3. Longer shutter — only viable for static subjects (PhotoRobot start-stop captures, no motion). Not viable for non-stop captures (motion blur) or video.

In practice, PhotoRobot operators trade off these three based on session conditions:

The trade-off triangle (aperture / ISO / shutter) is a sessional decision per capture type. PhotoRobot operators learn to recognise which combination fits each session.

10.4 — Why this matters for lighting planning

For lighting kit specification + session planning: high-aperture requirement drives light power requirements. A studio whose lighting kit produces acceptable exposure at f/8 + ISO 100 may struggle at f/16 + ISO 100 — needs four times the light power (each f-stop halves the light, f/8 → f/11 → f/16 is two stops = ¼ the light).

Studios planning deep-zoom-capable Carpet Studio, automotive Carousel, or premium product capture sessions should size their lighting kit accordingly — typically production tier or premium tier from the kit specifications in SPCARP03 §10 (carpet-specific; principle generalises).

§11 — Non-stop synchronisation: the productivity multiplier

PhotoRobot offers two capture modes for rotation-based sessions:

11.1 — Start-stop mechanics + productivity

Start-stop is the safe default. At each capture position:

Per-capture cycle time: typically ~3 seconds end-to-end for a standard turntable with mid-range robot. For a 24-stop standard 360° capture: 24 × 3 sec = ~72 seconds + camera review + sample handling = ~2-3 minutes per sample.

11.2 — Non-stop mechanics + productivity

Non-stop is the productivity mode. Robot rotates continuously at a calibrated speed; camera triggers fire at precisely timed moments using the robot’s position feedback:

The result: ~2 captures per second, no acceleration / deceleration / settling time wasted.

For the same 24-stop capture: 24 × 0.5 sec = ~12 seconds + minimal overhead = ~30 seconds per sample. Six times faster than start-stop.

For high-throughput catalog sessions (60+ samples per session day, recurring), non-stop is the productivity unlock. A studio shooting 60 samples in a 6-hour shift using start-stop (~3 min each) is at capacity; the same studio using non-stop (~30 sec each) fits the same throughput in under an hour, freeing the rest of the shift for other work or higher-tier customers.

11.3 — Strobe vs LED for non-stop

Non-stop works best with strobes:

For LED-only non-stop:

Modern LED fixtures with flash capability (LED designed to fire brief intense bursts, somewhere between continuous + strobe) bridge this gap for some session types. Hardware Specialist track covers LED fixture selection for non-stop applications.

11.4 — When non-stop is the right mode

11.5 — When start-stop is the right mode

11.6 — Production cycle implications

PhotoRobot’s headline production cycle target — one minute per item for high-throughput sessions — is built on non-stop synchronisation + strobe + wizard mode + scenario configuration. Operators who internalise this combination unlock the capacity the hardware was designed for. Operators who default to start-stop + manual mode never reach the productivity that justifies the equipment investment.

§12 — Adaptation for PhotoRobot rotation-based capture

Putting §3–§11 together, the key adaptations for PhotoRobot vs static product photography:

12.1 — Lighting design for full rotation, not single frame

Every fixture’s contribution must be evaluated across the full rotation cycle, not just at one favourable position. The four approaches (per the original three-point manual):

Default for PhotoRobot: Approach D (hybrid). Provides usable captures across all rotation positions + retains some dimensional character.

12.2 — Background lighting always

Per §4, the background pair (or 4-fixture for large workstations) is non-negotiable for any session where software background removal is part of the deliverable. Don’t skip it because “we’ll handle it in post” — manual post-production keying of poorly-lit backgrounds costs more than the lighting fixtures.

12.3 — Multi-camera rigs simplify rather than complicate

PhotoRobot Carpet Studio (7 cameras), Catwalk (multiple fixed), large turntables (multi-angle) — these multi-camera setups reward simpler lighting (Approach C dome or A even all-around) over complex multi-fixture choreography. The reason: complex lighting designed for one camera’s optimal angle creates shadows / hot spots that disturb other cameras’ captures.

For the multi-camera workstations, the default lighting structure (§3–§5) plus device-specific additions (cyclorama wash for Carpet Studio per SPCARP03; continuous fixtures distributed for Catwalk per its motion-capture requirement) handles most sessions.

§13 — Common problems + recovery

13.1 — Subject’s back edges “eaten” by background light wrap

Symptom. Software background removal cuts inside the subject’s actual outline. Captures show subject contour with bright halo from background.

Cause. Background over-illuminated relative to subject (per §4.3). Background light bleeds into subject edges; software keying interprets edges as background.

Recovery. Reduce background fixture power until background reads as the dominant tone but not pure white. Verify subject edges are clearly defined in capture preview before triggering production sequence.

13.2 — Glass-table session with shadow visible on glass

Symptom. Captures show subject’s shadow on the glass surface below; software keying complicates.

Cause. No bottom light + glass table configuration. Subject’s natural shadow lands on glass, becomes visible.

Recovery. Add bottom light (per §5.2). Position to fill the shadow zone without creating reflective hot spot on glass.

13.3 — Car / reflective subject captures show milky white reflections

Symptom. Car body, watch case, polished metal product reflects back a milky uniform white instead of clean directional light.

Cause. Tent / white room / over-diffused environment (per §7.2). Reflective surface reads the diffuse environment, not intentional lighting.

Recovery. Replace tent / open out room with controlled showroom-style lighting (per §7.3). Dark studio walls + directional fixtures whose reflections in subject are the intentional visual character.

13.4 — Stainless / polished metal reads as uniform grey

Symptom. Stainless steel cutlery, kettle, polished item captures look like plastic — uniform colour, no character.

Cause. No gradient lighting (per §9). Standard lighting produces uniform illumination → reflective surface reads as uniform grey.

Recovery. Add photographic paper at angle (per §9.2). Position + adjust until gradient reflection on subject surface is visible + character is restored.

13.5 — Captures show motion blur in non-stop mode

Symptom. Non-stop captures show subject moving across frame rather than sharp.

Cause. Rotation speed too high for camera shutter + lighting combination; or strobe not synchronised correctly; or LED-only setup at insufficient power.

Recovery. Reduce rotation speed first (easiest fix). If using strobes, verify sync timing (camera trigger advance compensation). If using LED, increase ISO + faster shutter; if still blurred, switch to start-stop or upgrade to strobes.

13.6 — Sharp at centre, soft at edges (deep zoom)

Symptom. Capture is sharp in centre of frame but visibly soft at edges of subject when zoomed in.

Cause. Aperture not high enough for subject depth + buffer (per §10). DoF doesn’t cover full subject diagonal.

Recovery. Increase aperture (smaller f-number). Recalculate DoF using PhotoRobot DoF calculator. May require more light power to compensate.

13.7 — Inconsistent background brightness across rotation

Symptom. Background reads brighter at some rotation positions, dimmer at others.

Cause. Insufficient background fixtures for cyclorama size (per §6.2). Single or two-fixture setup can’t evenly cover wide cyclorama.

Recovery. Add background fixtures distributed for even coverage. For large turntables, plan 4+ background fixtures from setup start.

§14 — Decision checklist

Two distinct decisions: studio installation (decided once, at commissioning — fixture count + positions + sync infrastructure) and per-session (decided per capture — which CAPP scope to load, which presets to use). The first is the Studio Manager / Hardware Specialist engagement; the second is the operator’s per-session work.

14.1 — Studio installation decision (commissioning-time)

Per §3.1 inversion: bias toward more fixtures in fixed positions than classical photography intuition would suggest. Set-and-forget is the design intent; software scope switching is the per-session flexibility.

Recommended fixture counts by intended customer scope:

14.2 — Per-session operator decision (with installed fixtures)

Once fixtures are installed + scopes calibrated, per-session decisions are CAPP scope choices, not fixture choices:

The operator’s per-session lighting decision is scope selection in CAPP, not “where do I put the lights” — that decision was made + paid-for-once at installation.

14.3 — Deliverable + infrastructure considerations

Deliverable requirements:

Studio infrastructure:

Customer scope:

§15 — Further reading

For PhotoRobot-specific device manuals, see photorobot.com/manuals. For the Carpet Studio lighting kit specification at minimum / production / premium tiers, see SPCARP03 §10.

For the DoF calculator + lens / camera tables used in §10 sharpness calculations, see photorobot.com (Hardware Specialist track covers selection + sizing).

For PhotoRobot CPQ configurations + lighting kit recommendations matched to subject category + workstation scale, see PhotoRobot sales engagement scoping.