Tone line process in computer graphics refers to the practice of producing line art using tone gradients in order to produce more realistic and three-dimensional results. Tone gradients help give this effect by giving depth perception by simulating shadow depth gradients on line art pieces.
Tone line processes are often employed when producing digital printing line art due to their realistic three-dimensional quality, helping make line art stand out more for marketing purposes and further strengthen branding efforts.
Digital art’s tone line process provides a way to produce line art with more of a painterly aesthetic. To do so, start off with black-and-white line art images as the starting point, add another layer filled with solid color as the next step, draw lines over top that show through from underneath, set their blend mode appropriately so colors below can show through, etc.
There are various techniques you can employ when using this technique to achieve different effects. One option is using light colors on the top layer for subtler results; dark hues create dramatic, eye-catching displays; using multiple hues can result in even more complex and engaging displays;
The tone line process can create many distinct looks by playing around with colors and drawing different lines in different ways, using either solid colors or drawing random, unconnected ones. Its versatile nature enables it to produce anything from an easily created background scene up to more complex, intricacies images.