When I first came across ART (Another RawTherapee), I honestly thought it would be just another clunky open-source editor I’d test out and forget about. But it actually ended up surprising me. ART takes everything great about RawTherapee and repackages it into something lighter, faster, and more approachable, without losing that depth photographers need.

What stood out to me is that it competes with big-name software like Lightroom. It handles raw image processing and produces film-like color grading as well as batch image editing — pro-level tools in a clean interface that doesn’t slow down your device. It’s pretty much the open-source answer to anyone who wants a powerful image editor without getting locked into a subscription. Here are my first impressions…

It handles RAW like a pro

Deep color range, dynamic range, and detail retention

If you’ve ever shot in raw, you know how much data is packed into those files. There’s the shadow recovery, highlight retentions, and the overall full dynamic range of the scene captured. ART’s engine is built on RawTherapee’s, so you’re getting pro-level demosaicing right out of the gate, such as AMaZE, IGV, and LMMSE. The sharpening and noise reduction features also whip your shot into shape before it's time to move on to the color correction and grading process.

What I like about it is that it’s not boxed into basic sliders like most other free graphics apps; it actually gives you the same kind of precise control as Lightroom or Capture One. It can handle even the smallest and trickiest things like chromatic aberration and lens distortion automatically through built-in profiles. This means I can drop in my raw shots, and they come out clean and ready to be styled. Having this level of processing upfront saves a lot of time down the line because the base image is already properly tuned.

Film-like looks and color control

Color grading that feels hand-crafted

ART has a Color panel for color correction and grading. It feels like a simplified version of Darktable’s color editing toolkit. It’s got full-on tone curves, color calibration, HSL controls, and even LUT support if you want to go for a more cinematic look. What I love most is how subtle you can get with it — instead of heavy filters, ART’s feature set lets you nudge color more organically. So you can go all in and simulate old Kodak film stocks, or do something subtle and custom.

There’s a massive suite of coloring and lighting tools. The right-hand panel is where you’ll spend most of your time making tweaks with features like saturation and exposure. For a lightweight app, the number of sub-controls on every feature is surprising — you can even add masks. There is also a selection of guides in the top panel to help you better gauge the state of your image, including exposure indication, focus mask, and clipped shadow indication. Plus, ART lets you add scripts and custom modules, so you’re not confined to the program's default offerings.

I’ve actually been using ART to tweak JPEG and PNG images to match a design project’s color palette. For example, I prefer my images to have a slightly blue tint with high contrast, which is dead simple to do in the program. Since it works in high bit depth, the colors are smooth and rich after pushing them around. So even if you’re not a photographer but rather a designer who cares about consistent mood and tone across visuals, ART can be your go-to color grading suite.

Non-destructive workflow

Your originals stay intact, no matter how experimental you get

In my opinion, one thing that separates real image editors from the rest is the ability to edit non-destructively. In ART, all adjustments are non-destructive, so I can revisit them at any point since they’re not baked into the original file. You’ll find this function in the left History panel — just click on any change made at a particular point, and the settings will be exactly as you’ve left them, and they’re editable. This way, I don’t have to worry about losing image quality throughout the process, and I also have more room to experiment with color grading.

Batch editing support

One hundred photos fixed with one tweak

ART comes with one of the least glamorous but most practical editing functions: batch image editing. This is a critical feature for photographers who shoot loads of images in raw. But even if you’re a different type of creative who simply works with large quantities of images or sequences, you know how tedious it can get to edit each one by hand.

In ART, you can apply the same edits across a batch of images with a few clicks. I use the copy-and-paste route. I locate my edited shot in the ART file browser, and right-click -> Processing profile operations -> Copy. Then, I multi-select (hold Ctrl) my other images, right-click -> Processing profile operations -> Paste. It’s as easy as that.

The open-source underdog that delivers

After spending some time with ART, I can confidently say it’s not just another freebie that you download and forget about. While it is a simpler version of RawTherapee and therefore lacks a few things, it nails the balance between power, control, speed, ease, and lightweight. The RAW handling doesn’t fall short of proprietary offerings like Lightroom, the color looks are easy to apply and look authentic, and batch processing saves loads of time. If you’re serious about your images but tired of the subscription treadmill, ART is the kind of software that can genuinely shift how you work.