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Quizzesspcarp02-texture-revealing-lighting

SPCARP02 Texture-Revealing Lighting

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Knowledge check

Texture-Revealing Lighting

12 questions in pool · live exam draws 5

SPCARP02

12 questions · live exam draws 5

Q1 multiple-choice · raking-light

Raking light is best characterized as:

A) Overhead lighting at 90° from horizontal
B) Low-angle light at 10-30° from horizontal — creates shadows revealing texture / pile / weave
C) Front-on lighting from camera direction
D) No lighting at all

Source: SPCARP02 §1.

Q2 multiple-choice · standard-vs-raking

Why does standard product lighting fail for carpets?

A) Too bright
B) Lights flat — pile direction invisible, weave muted, specular diffused, depth lost
C) Wrong color temperature
D) Standard lighting works fine for carpets

Source: SPCARP02 §1.

Q3 scenario · wool-strategy

Hand-knotted Persian wool rug, B2B catalog, deep pile.

A) Overhead softbox + fill, multi-azimuth
B) Extreme rake 10-15°, single-direction azimuth, color temp 4000-4500K, minimal diffusion — reveals knot detail + pile direction + heritage character
C) Daylight only
D) Continuous backlight only

Source: SPCARP02 §3.4.

Q4 multiple-choice · synthetic-strategy

Right lighting for synthetic loop-pile carpet?

A) Extreme rake + no diffusion (will create hot spots)
B) Moderate rake 20-30°, cross-rake or multi-azimuth, color temp 5000-5600K, moderate diffusion — softer treatment for shinier synthetic fibers
C) Tungsten side-light only
D) No specific approach

Source: SPCARP02 §3.2.

Q5 multiple-choice · pile-up-effect

Pile-up effect symptoms include (which IS one):

A) Camera focus drift
B) Pile direction inconsistent across captured frames OR pile height varies frame-to-frame OR pile streaking
C) Background color shift
D) Audio noise

Source: SPCARP02 §4.1.

Q6 scenario · pile-up-recovery

Heavy dense pile rug on fast non-stop spin. Pile-up detected mid-capture.

A) Switch to stop-frame mode + re-comb pile + recapture affected frames
B) Continue capture; fix in post
C) Skip the sample
D) Apply random adjustments

Source: SPCARP02 §4.4.

Q7 multiple-choice · strobe-power

Right strobe power for fast-spin capture?

A) Always 100% for maximum light
B) 50-75% — balance between light output + recovery time (avoid missed firings on rapid sync)
C) Always 25%
D) Variable random power

Source: SPCARP02 §5.2.

Q8 multiple-choice · strobe-color-stability

Color stability across many strobe firings discipline?

A) Use higher-end strobes (Profoto / Broncolor) + test color at start + middle + end + allow cooling breaks if heating becomes visible
B) Ignore; color is fixed by firmware
C) Use only one strobe firing per session
D) Skip color check

Source: SPCARP02 §5.3.

Q9 multiple-choice · colorchecker

Carpet ColorChecker workflow per session?

A) Once at start
B) Start + end + placed on platform with each sample for per-fiber-type validation
C) Never
D) Auto-applied by camera

Source: SPCARP02 §6.1.

Q10 scenario · pantone-production

Production-proofing customer requires Pantone targets matched within ΔE < 3.

A) Visual matching by eye
B) Pantone reference patches in frame + measured ΔE post-capture + lighting at D50 (5000K) print industry standard
C) Approximate matching
D) Skip Pantone for textile work

Source: SPCARP02 §6.3.

Q11 multiple-choice · depth-validation

“Reads as 3D” indicators include (which IS one):

A) High file resolution
B) Pile direction obvious + weave shadow + highlight contrast + dimensional edge
C) Saturated colors
D) Vibrant background

Source: SPCARP02 §7.1.

Q12 true-false · capture-time-fix

Pile-up effects can be fixed in post-production.

True
False ← CORRECT
Total: 12 questions
Multiple choice: 11
True/False: 1
Drawn per attempt: 5

Source: SPCARP02 §4.4.

Explanation: Pile-up is a capture-time geometric failure. Post-production cannot reconstruct the pile direction. Capture-time fix (re-comb + stop-frame + recapture) is the only solution.

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