Artitude begins by analysing the image, finding edges and local "flows", then uses that analysis for the processing that follows. A Tweak adjustment controls the smoothness of this analysis. The work is organised into five sections: Paint, Texture, Smooth, Toon, and a final processing section.
Paint applies an initial gamma adjustment and color correction to intensify and sharpen colors, plus two styles of painting simulation, a caricature-like organic distortion, and a thresholded gaussian blur to smudge the results. Texture handles outlines, stipple, and shading. Smooth provides bilateral smoothing that retains edges, with an adjustable threshold and iteration. Toon separates the image into hue, saturation, and luminance, allowing discrete quantization of each channel and the ability to map the hue to real-world ink colors.
Final processing mixes any of these sections using Photoshop-style blend modes, with a slider for blend intensity and a final edge-sensitive smoothing; any section not used to create the final image is bypassed. Because these techniques carry high processing costs, a Turbo mode increases interactivity at the cost of some resolution, which you turn off before rendering. Presets offer a starting point to tweak.