● Working with dynamic lines and strokes
● Properties of drawn objects, transfer of material texture with the help of a line
● Volumetric elements in 2D drawings, volume depiction
● Line change depending on lighting, depiction of light and shadow
● Physically correcting parameters when drawing objects: connection to plane, mass of objects
● Depicting contrast through line, glare, refraction angles, reflections and bends
● Depicting object texture, drawing patterns and repeating objects
● Line depth, use of lines to determine objects' distance from the viewer
● Line hierarchy for individual objects, creating a quickly readable image of an object