Photo Editing

Photo Editing — questions and answers

What file format should edited images be saved in to preserve all the adjustment layers?

PSD or TIFF formats retain layers, masks and adjustment data, letting you reopen and modify edits later. JPEG flattens everything into a single layer and applies lossy compression, so it works for final delivery but discards the editing structure. Some editors also use DNG for preserving raw data with non-destructive edits embedded.

How do frequency separation and dodge-and-burn differ for retouching skin?

Frequency separation splits texture from colour and tone, letting you smooth skin tones without losing pore detail or soften texture independently. Dodge-and-burn lightens and darkens specific areas to sculpt contours and even out patches, working more like traditional darkroom techniques. Many retouchers combine both methods depending on what the image needs.

Why would you edit in 16-bit instead of 8-bit?

Sixteen-bit files contain far more tonal information per channel, which prevents banding and posterisation when making heavy adjustments to exposure, curves or saturation. The difference matters most when pushing edits hard or working with gradients. Eight-bit suffices for light corrections or when file size becomes a constraint, but the safety margin is much thinner.

Can you recover detail from completely blown-out highlights?

If the sensor recorded pure white with no data, there is nothing to recover. Highlights that appear blown but retain some information in the raw file can often be pulled back using exposure or highlight sliders. Shooting raw rather than JPEG gives you the best chance, as JPEG processing clips data earlier in the pipeline.

What does clipping the histogram actually do to an image?

Clipping means tones have been pushed beyond pure black or pure white, losing all detail in those areas. Shadows that clip become featureless black blobs, and clipped highlights turn into blank white patches. Once clipped in the final file, those areas cannot be recovered because the data no longer exists, though raw files often retain more headroom than the preview suggests.

When should you use a curves adjustment instead of just moving the exposure slider?

Curves let you target specific tonal ranges independently, so you can lift shadows without overexposing highlights or add contrast to midtones while protecting the extremes. Exposure sliders shift everything uniformly. Curves offer far more control for nuanced corrections, though they require more understanding of how the tone curve maps input to output values.