Lighting and Capture Tips for Better 3D Face and Body Scans

The quality of a 3D model is decided in the few seconds of capture. A good phone and good software cannot fully rescue a scan taken in poor light with a moving patient. The good news is that the fixes are simple and cheap. This guide is written for the doctors, nurses and front-desk staff who will run scans every day.

1. Get the lighting right

Lighting is the single biggest factor. Photogrammetry reads shape partly from how light falls across the surface; harsh shadows look like contours that are not there.

Do:

• Use even, diffuse light from the front and both sides.
• Choose a room with consistent artificial light rather than changing daylight.
• If needed, add one or two soft LED panels at face height, angled slightly inward.

Avoid:

• Backlight: never seat the patient with a window behind them.
• Single overhead tube lights directly above the head, which shadow the eye sockets and under the nose.
• Mixed colour temperatures, such as warm bulbs plus cool daylight.
• Very dim rooms, which force the camera to slow its shutter and add blur.

2. Prepare the patient

• Hair: tie hair back and clear it off the forehead and ears, unless the hairline itself is being recorded, as in hair transplant planning.
• Accessories: remove glasses, earrings, nose pins and headbands.
• Makeup: ask patients to arrive without heavy foundation, or offer a quick cleanse. Bare skin gives the software texture to work with and keeps skin analysis meaningful.
• Shine: blot oily skin; shine creates reflections that confuse matching.
• Expression: neutral face, lips gently closed, eyes open looking straight ahead. Use the same instruction every time.
• Clothing: for face scans, a neckline that shows the jaw and upper neck. For body scans, fitted clothing or a gown that does not drape over the area.

3. Position the patient

• Seat the patient on a stool without a high back, so you can move around the head.
• Keep the head in a natural, level position (the Frankfort horizontal plane is the clinical reference: the line from the ear canal to the lower eye rim parallel to the floor).
• Mark a fixed spot on the floor for the stool so position repeats at follow-up.

4. Move the phone well

• Hold the phone at roughly arm's length, at face height.
• Move slowly and smoothly in an arc around the face, keeping the face centred.
• Cover the underside of the chin and both sides of the nose; these are common holes.
• Do not stop and restart mid-pass; one continuous sweep is best.
• Ask the patient not to follow the phone with their eyes or head.

5. Make follow-up scans comparable

The value of 3D imaging lies in comparison, so repeatability matters more than any single perfect scan. Lock down:

• the same room and lighting,
• the same stool position,
• the same hair arrangement and expression,
• a similar time of day where swelling matters, for example after injectables.

We cover the full follow-up protocol in tracking patient progress across follow-up visits.

A 30-second pre-scan checklist

Print this and keep it in each consult room:

1. Light on, blinds closed, no backlight.
2. Consent recorded for this scan.
3. Hair back, accessories off, skin blotted.
4. Stool on the floor mark, head level.
5. Neutral expression, eyes forward.
6. One slow, continuous pass, including under the chin.
7. Check the model before the patient leaves.

Common problems and fixes

For the theory behind these tips, read how smartphone 3D scanning works. For the photography side, see clinical photography setup for a small clinic.

Edebo is a measurement and visualisation tool, not a diagnostic device. Clinical decisions remain with the treating practitioner.