Rebelle (software)
Rebelle (software)
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Rebelle (software)

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Rebelle (software)

Rebelle is a raster graphics editor for digital painting and drawing, designed to simulate oils, acrylics, watercolors, pencils and other traditional paint media on a digital canvas. It is developed and published by the Slovak company Escape Motions. The software is intended to be used by everyone interested in digital painting, from children to professional digital painters, concept artists and illustrators. It was first released in 2015 and has since gained popularity among artists seeking to replicate the natural and organic feel of traditional tools in a digital environment.

Rebelle’s paint engine simulates various types of wet and dry media. The pigment color mixing, oil thickness, watercolor diffusion, and NanoPixel technology work together to realistically emulate how natural media interact with each other and with the canvas.

The first Rebelle version was released in 2015. Escape Motions was accepted to present it at the SIGGRAPH’s 2016 Appy Hour where independent app developers introduce their apps to the attendees.

The current version is Rebelle 8, released in Early Access in July 2025, followed by the full release in October 2025. Rebelle is currently available in two different editions: Standard and Pro which includes additional features: Bristle brushes, RealShader with SoftShadows, Pigment color mixing, NanoPixel technology, Smooth scaling, Metallic materials, Advanced PSD import & export, Photoshop plugin, Color management, Fractal image resizing, WebSocket control input and Motion IO.

Rebelle is compatible with Windows and MacOS and is designed to be used with a tablet PC or graphics tablet, but it can be used with a computer mouse as well.

Rebelle includes wet media tools: oils, acrylics, watercolors, ink pens, and dry tools: pastels, pencils, charcoals, markers, and airbrushes. Other tools are blend, smudge, liquify, clone, fill, water, dry, blow, color picker, tilt, transform tools, selection tools, and more.

Rebelle includes different types of customizable brushes with various brush textures. It offers multiple paper surfaces that serve as a background for the painting and dynamically interact with the painting tools. The software has a touch gesture system for touch and multitouch displays, which supports simultaneous zooming, rotating, and panning.

Rebelle’s watercolor simulation is built upon real-world color mixing, blending, moistening, and drying. The fluid simulation is based on Navier-Stokes equations to simulate the realistic fluid flow occurring in nature. Watercolor simulation in Rebelle is an extensive sandbox that consists internally of multiple layers, used to calculate the water and paint simulation, wetting, drying, and re-wetting already dried colors. Users can paint, erase, blend, and smear the painting, tilt the canvas to create water drops, and various watercolor effects, which are calculated in real-time. The simulation offers a realistic granulation effect as the paint dries into the paper.

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