How to Recover Underexposed Portraits Without Destroying Skin

To recover an underexposed portrait without damaging skin, work from the raw file, lift exposure conservatively, correct the colour shift in the shadows before anything else, denoise before any sharpening, and rebuild contrast locally with a gentle curve and dodge and burn. Retouch skin only once the recovery is done. Recovered frames that look processed were nearly always edited in the wrong order.

Underexposed portraits can be recovered more often than photographers expect, and are ruined in recovery more often than they should be. The difference is almost entirely the order of operations.

What happens when you lift shadows

Three things at once, and skin shows all three first.

Noise appears. It was always there; lifting amplifies it along with the image. The shadows have the worst ratio of signal to noise, and they are exactly what you are lifting.

Colour shifts. A sensor's response is least reliable at the bottom of its range. Deep shadows often turn green or magenta as they are brought up, and on a face that reads as wrong immediately.

Contrast collapses. Lifting shadows on their own compresses the tonal range. The result is flat and grey, and the instinctive fix, adding global contrast, pushes the noise straight back up.

The order that works

1. Start from the raw

A JPEG has already discarded much of the shadow information and carries compression artefacts in exactly the region you are about to amplify. If there is a raw file, use it.

2. Lift globally, but not all the way

Raise exposure and shadows in the raw processor before anything else, stopping short of the final brightness. The last part of the lift is done locally, where you can protect what needs protecting.

3. Correct the colour shift straight away

Before denoising and before contrast, look at the shadow areas. If they have turned green or magenta, correct that now.

Leave it until later and every decision in between is made against the wrong colour, so you end up correcting twice.

4. Denoise before anything is sharpened

Machine-learning denoise makes a large difference to this kind of file, and it is what turns many dark frames from unusable into deliverable.

Two rules: run it at full resolution, and look at skin specifically. Denoise removes fine detail, and skin texture is fine detail, so over-denoised skin is plastic skin by a different route.

5. Rebuild contrast locally

Global contrast raises noise everywhere, including areas that were fine. Use a gentle S-curve on the midtones instead, then local dodge and burn to put back the modelling the lift flattened.

6. Retouch the skin

Only now. Frequency separation, dodge and burn and the usual cleanup, as described in How to Retouch Skin Without Making It Look Plastic. Retouching before the recovery means doing it again afterwards.

7. Sharpen selectively, at the end

Mask sharpening to the eyes and edges. Sharpening globally brings back the noise you have just removed.

How far your camera can be pushed

There is no general number worth trusting. How much a file tolerates depends on the sensor, the ISO you shot at and the size of the final output, and a frame that holds up for a web gallery may not survive a large print.

You can find your own limit in ten minutes. Photograph a subject with skin in the frame at correct exposure, then at one, two, three and four stops under. Recover each one and compare them side by side at 100%. The point where shadow colour stops being reliable is your practical limit, and after that you never have to guess on a job.

As you pass that point, colour goes first, then fine detail. Beyond it you are producing an image rather than recovering one.

Deeper skin tones need extra care

Deeper skin tones sit lower in the tonal range, so every issue above affects them more, and the colour shift matters more because there is less separation between skin and shadow.

Two things help. Correct the colour shift before anything else, because it is the main problem rather than brightness. And use luminosity masks that target the skin's actual tonal range rather than a broad shadows selection that also catches the background.

Never lift dark skin towards a lighter tone in the name of brightening. The subject's skin tone is the subject's skin tone. Brighten the exposure, not the person.

When to leave it dark

Some underexposed portraits work better as low-key photographs than as recovered ones. If the face is lit and the rest falls into darkness, that may be the picture: grade it deliberately, keep the shadows dark, and it reads as a choice.

Recovery for its own sake produces a grey frame with noise in it. A deliberate low-key frame is a photograph.

Preventing it

Expose for the face, not the average of the scene. Use highlight-weighted metering if your camera offers it. With a raw file, exposing slightly brighter and pulling back in post is nearly always better than the reverse.

Sending a dark set to a retoucher

Send raw files, or the least-processed version you have, rather than JPEGs you have already brightened. A heavily lifted export has lost shadow detail and baked in its noise.

Mark the frames that are meant to be dark. A low-key frame brightened to match the rest of the set is a frame ruined by good intentions.

Include a skin-tone reference where the light was difficult. A well-exposed frame of the same person from the same session is ideal, because it shows what the recovered skin should look like.

Exposure and contrast adjustment and colour correction are part of Standard Retouching at $4 per image. When a frame has gone past what honest recovery can do, it is better to hear so before delivery than to find a noisy grey version in the gallery.

Common questions

How many stops can I recover? It depends on the sensor, the ISO and the final output size, so there is no general number worth trusting. Bracket a test subject at one to four stops under, recover each frame, and the point where shadow colour stops holding is your limit.

Why are the shadows green or magenta after lifting? A sensor's response is least reliable at the bottom of its range. Correct that shift before denoising or adding contrast, or every later decision is made against the wrong colour.

In what order should I lift, correct and denoise? Lift conservatively, correct the colour shift, then denoise, and sharpen only at the end. Sharpening before denoising amplifies the noise you were about to remove.

Is recovering dark skin different? It needs more care rather than a different method. Correct hue before brightness, target the skin's actual tonal range, and never lift a subject's skin towards a lighter tone.

Should I brighten in the raw processor or in Photoshop? In the raw processor. It works on the sensor data, with far more latitude than a rendered file in a pixel editor.

Related reading: How to Fix Mixed Lighting and Wrong Skin Tones and RAW vs JPEG for Professional Retouching.