Things you want to improve in ART?

paperdigits · December 6, 2025, 8:34pm

No, you should open an issue on github: GitHub · Where software is built

tankist02 · December 6, 2025, 8:50pm

Thanks, done.

yasuo · December 6, 2025, 11:43pm

As far it is only operational on Windows. I’m not sure but I suppose “file-raw-placeholder” recognizes the raw processor in your system, and activates appropriate raw processor plug-in, however it recognizes ART only on Windows as far and on other OS “file-another-rawtherapee” is not activated. It may be fixed before GIMP 3.2 completed version will be released.

age · December 18, 2025, 9:22pm

Are negative values clamped before CTL scripts (ART 1.25.11)?
I was trying to visualize the negative values with a script ( pratically if rgb<0 , 1 else 0) but the display is always black.
check negative3.txt (1.5 KB)

In the following image I expect a lot of negative values

Probably there’s something very wrong with my script.

tankist02 · January 4, 2026, 10:47pm

Would it be possible to add support for images in HEIF/HEIC format? Darktable can open such files from Sony A7IV, but I couldn’t make ART to do the same. Sony files have .HIF extension

sguyader · January 5, 2026, 3:54am

You can follow the instructions here: Adding Support for Custom Image Formats | ART raw image processor

paulmatth · January 5, 2026, 1:20pm

At the bottom of that instruction page there’s a link to a repo with image handlers, and one is called heic.txt.

Follow the install instructions here:

github.com/artraweditor/ART-imageio

README.md

main

# README #

This repository contains a list of [custom image format](https://bitbucket.org/agriggio/art/wiki/Customformats) plugins for the [ART](https://bitbucket.org/agriggio/art) raw processor.

### Structure of the repository ###

Each plugin consists of two parts: 

* A `format.txt` configuration file
* An optional `format` directory containing auxiliary files,

where `format` is the name of the file format handled by the plugin (e.g. `exr.txt`).

### Installation in ART ###

Each plugin can be installed separately, by simply copying both the `format.txt` and `format` directory to the `imageio` directory in the ART config folder (e.g. on Linux that would be `$HOME/.config/ART/imageio`).

Each plugin uses different external programs and dependencies, that are listed at the beginning of the `format.txt` file. Such dependencies must be installed separately.
Most of them require at least [Python](http://www.python.org) and [Exiftool](http://exiftool.org).

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paulmatth · January 5, 2026, 3:16pm

A thing that I’d like to see improved in ART is the following.

I have a folder with lots of photos, 100+. When I select one in the middle and activate the Inspector, the photo opens fine. But where is the selected thumbnail? I have to scroll and to scroll to find it…

It would be nice when the selected thumbnail showed up next to the inspected photo.