Guide

Faces look flat in laser engraving

The eyes are fine, but the face reads like a mask. Check these in order.

Reviewed by the Vextrify team, tested in our own laser workshops · Updated · How we test

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01

Why faces go flat

A face is mostly mid-tones. When tonal range is compressed, those mid-tones merge into one grey and the shape disappears. Dot gain, where the burn spreads and darkens, squeezes the range further. The fix starts in the file, with more separation between the tones inside the face.

  • Faces are mostly mid-tones
  • Compressed range = flat face
  • Dot gain squeezes it further
02

Add contrast where the face is

Raise contrast and adjust the gamma in Photo Studio's tone controls while watching the face in the live preview, not the whole picture. Keep eyes, nose edge and jawline readable. Over-pushing closes the shadows into solid patches, so stop when detail is still visible in the dark areas.

  • Judge the face, not the whole frame
  • Keep eyes, nose and jaw edges readable
  • Stop before shadows close
See Photo Studio
03

Separate the subject

A background with a similar tone as the skin merges with the face. Remove it with the background remover, which outputs a transparent PNG; Cut Pro on Vextrify's server handles hair and difficult edges.

  • Similar tones merge face and background
  • Cut Pro handles hair and edges
Remove the background
04

Compare dithering methods

Different dithering methods render smooth skin differently, some with a coarser texture and some with a finer one. Try several in the live preview on the face at full size. If the result is grey and lifeless rather than flat in shape, or too heavy, see the muddy and too-dark guides. Settings come from a material test grid on scrap.

  • Try several methods on the face
  • Muddy and too dark are separate problems
  • Settings from a test grid
Photo engraving looks muddy
05

Know the limits of the source

Not every flat face can be rescued. A portrait taken in flat light, with no shadow on one side, has little shape to bring out, and a small or badly out-of-focus photo has little detail. In those cases ask for a photo with side light or a closer crop. When the source is only small, Photo Upgrade can enlarge it, and its Standard setting runs on the device. Judge the result at full size on the face, and engrave a small test before the real piece.

  • Flat light means little shape to recover
  • Ask for side light or a closer crop
  • Test a small version first

Common questions

Can software fix a flat face?

It can separate the tones that are already in the photo. It cannot create detail that the source does not contain.

Which dithering method is best for faces?

It depends on the photo and the material. Compare several in the live preview at full size and then test on scrap.

Does removing the background help?

Often. When the background is similar in tone to the skin, they merge, and separating the subject helps the face read.