Lumi-o

At a glance

• Editor score
  5.1 / 10
• Pricing
  Free plan
• Best for
  Linux artists seeking pressure-aware painting
• Free plan
  Yes
• Paid from
  Free
• Drawing modes
  Raster painting and illustration
• Facts checked
  3 Oct 2026

• Where it wins

  • Brushes respond to pressure, speed, direction and tilt.
  • Layer masks, groups, blending, effects and editable filters support detailed workflows.
  • Autosave, incremental saves and recovery help protect complex projects.

• Where it doesn't

  • Runs on Linux only, so it does not suit artists on other platforms.
  • It is a desktop application, not a cloud-based drawing tool.
  • Support is through documentation, which may not suit buyers seeking direct assistance.

Our verdict on Lumi-o

Lumi-o is a free, open-source application for raster painting and illustration on Linux. Its pressure-aware brushes, layer-based editing and pigment-mixing tools target solo artists who want a structured painting workflow without a subscription or cloud dependence. It also includes features for photographic correction, and supports importing and exporting XCF and PSD files alongside its native .lum format. The Linux-only scope is a decisive boundary: artists working on other platforms should look elsewhere.

Brushes can respond to stylus pressure, speed, direction and tilt, while smoothing and stabilization offer control over drawn strokes. For image organization, layers support masks, groups, blending and effects; filters remain editable rather than being permanently applied. Palette tools use spectral pigment mixing. Together, these features make Lumi-o more than a basic sketching app: it is suited to artists who want to adjust a layered raster image after initial marks are made. Scheme-based plug-in scripting adds an option for extending workflows, though it may matter most to users comfortable with scripting.

Autosave, incremental saves and recovery address the risk of losing work, while lazy loading is intended to help with complex projects. Lumi-o is a desktop application, and its support channel is documentation. Those traits fit an individual Linux artist who values local, open-source software and can work within a docs-led support model. It is a weaker fit for teams that need broader platform availability, cloud collaboration or direct support. Artists who rely on XCF or PSD can use the stated import and export support, while those needing a different workflow should compare alternatives before committing.

Your product? Our editors can test Lumi-o in depth and publish a review, labelled as paid · from $149/mo →

Lumi-o pricing

Lumi-o fact sheet

Alternatives to Lumi-o

• KritaA capable free painting program with animation tools for desktop and Android.9.4
• Adobe FrescoFresco combines pixel, live, and vector brushes with animation and Adobe app exchange.9.3
• ibisPaintA cross-device drawing app with customizable brushes, layers, and CMYK export options.9.2

See all Lumi-o alternatives →

Featured on iTechGuides

Lumi-o is listed in our Free Drawing Software directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/lumi-o/"><img src="https://www.itechguides.com/best/badge/lumi-o.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 30 Oct 2026 · How we research and update