HDR Merge Master

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Score6.5

Rank#6 of 20

Free planNo

Runs onLinux, macOS, Windows

Summary

HDR Merge Master is ranked #6 of 20 in HDR software on Everything Xiaomi. It runs on Linux, macOS, Windows.

Compared on HDR software

HDR merge mode: bracketedgithub.com
Batch processing: Yesgithub.com
RAW file support: Yesgithub.com
HDR output formats: 32-bit OpenEXR, Radiance HDRgithub.com
Supported platforms: Windows, macOS, Linuxgithub.com

Facts

What it does: HDR Merge Master uses Blender’s compositor to merge exposure brackets in bulk into 32-bit EXR files.github.com · 3 Oct 2026
HDR output: The output format can be 32-bit OpenEXR or Radiance HDR.github.com · 3 Oct 2026
Alignment: The app offers no alignment, Hugin pre-alignment, or MTB alignment, depending on the Blender version and selected mode.github.com · 3 Oct 2026
Preview files: The tool creates tonemapped JPG previews alongside the merged HDR files.github.com · 3 Oct 2026
RAW processing: Processing camera RAW files requires RawTherapee; existing adjacent PP3 profiles are used automatically.github.com · 3 Oct 2026
Integrations: The project documents optional use of Blender, RawTherapee, Hugin, Luminance HDR, and PTGui workflows.github.com · 3 Oct 2026
PTGui workflow: An included script can replace JPG paths with EXR paths in a PTGui PTS project.github.com · 3 Oct 2026
Automation: A headless command-line mode supports batch JSON input, folder processing, alignment options, thread settings, and cleanup.github.com · 3 Oct 2026
Blender versions: Blender 4.5 LTS or 5.1 LTS are actively tested; older versions use a legacy script with reduced features.github.com · 3 Oct 2026
Notable limit: The tool does not perform ghost removal, and the README recommends using a steady tripod.github.com · 3 Oct 2026
Who it is for: The README describes the intended workflow as creating HDRIs for stitching, then swapping JPG previews for EXR files before final export.github.com · 3 Oct 2026
License: The repository identifies its license as GPL-3.0.github.com · 3 Oct 2026
Release downloads: The project distributes downloadable builds through GitHub Releases.github.com · 3 Oct 2026
Maker: The repository owner is Greg Zaal, whose GitHub profile lists South Africa.github.com · 3 Oct 2026
Purpose: HDR Merge Master uses Blender's compositor to merge exposure brackets in bulk into 32-bit EXR files.github.com · 4 Oct 2026
HDRI workflow: The maker says Poly Haven uses the tool to merge exposure bracket sequences for HDRI creation.github.com · 4 Oct 2026
Batching: The app supports multiple input folders, recursive processing, and batch lists that can be imported or exported as JSON.github.com · 4 Oct 2026
Output formats: Merged output can be 32-bit OpenEXR or Radiance HDR, and the app also creates tonemapped JPG previews.github.com · 4 Oct 2026
Other integrations: The workflow can use Hugin's align_image_stack for image alignment and includes a script to replace JPG paths with EXR paths in PTGui project files.github.com · 4 Oct 2026
Requirements: The maker actively tests with Blender 4.5 LTS and Blender 5.1 LTS; older Blender versions use a legacy merge script with reduced features.github.com · 4 Oct 2026
Notable limitation: The tool does not remove ghosting, and the maker advises using a steady tripod when shooting.github.com · 4 Oct 2026
Download: The installation instructions direct users to download the latest GitHub release and run hdr_merge_master.exe.github.com · 4 Oct 2026
Linux builds: The release notes state that Linux release binaries were added.github.com · 4 Oct 2026