To merge HDR photos in Lightroom, select your bracketed exposures, right click, and choose Photo Merge, then HDR. Lightroom combines them into a single DNG file that keeps a wide tonal range, and you edit it like any raw file. The key to a natural result is a clean bracket and gentle processing afterward.

How to Merge HDR Photos in Lightroom and Process the DNG File

Shoot a Usable Bracket

A good merge begins in the camera. These are general baselines to adapt to the scene.

  • Use a tripod when possible, and keep the framing identical across frames.
  • Shoot in raw and in aperture priority, so only shutter speed changes between frames.
  • Take three to five frames, spaced about one to two stops apart, covering both bright highlights and dark shadows.
  • Turn off autofocus after focusing, and use a remote release or timer.
  • Avoid moving subjects such as people or clouds in fast motion if you can.

Merge the Exposures

  1. In the Library or Develop module, select all frames in the bracket.
  2. Right click, go to Photo Merge, and choose HDR. You can also press Ctrl+H on Windows or Cmd+H on Mac.
  3. In the merge dialog, turn on Auto Align if you shot handheld.
  4. Turn on Auto Tone for a quick first balance, or leave it off for a flatter file that you shape yourself.
  5. Set Deghost to Low, Medium or High if something moved between frames, and use the overlay to see affected areas.
  6. Click Merge. A new DNG file appears next to the originals, often stacked with them.

Process the Merged DNG

The DNG has a larger tonal range than a single raw file, so shadows and highlights respond well to adjustment.

  1. Lower Highlights and raise Shadows in moderate amounts, then fine tune Whites and Blacks.
  2. Set white balance if needed, as it can be changed freely in the file.
  3. Add contrast with the Tone Curve rather than strong global contrast, which makes images look flat or harsh.
  4. Apply Texture and Clarity sparingly, since heavy values create halos and a gritty look.
  5. Use masks such as linear and radial gradients to balance sky and foreground separately.
  6. Check noise in dark areas and apply noise reduction if it appears.

Common Problems

Problem Likely cause Fix
Ghosting Moving subjects Increase deghost level or use one frame for that area
Soft detail Misaligned frames Use a tripod or turn on Auto Align
Unnatural halos Strong local contrast Reduce Texture, Clarity and Dehaze
Muddy color Over-lifted shadows Lower Shadows and adjust Blacks

FAQ

Do I need three or more frames?

Two frames can work for modest scenes, but three gives a more reliable range. Scenes with a bright sky and a dark interior benefit from more.

Can I merge a single raw file?

No, since HDR merge needs different exposures. For one file, use the highlight and shadow controls directly.

The Short Version

Shoot a steady bracket in raw, select the frames and use Photo Merge, then HDR with alignment and deghosting where needed. Edit the DNG with moderate highlight, shadow and curve changes so the final image still looks natural.