● work with dynamic lines and strokes
● properties of drawn objects, transfer of the material texture with the help of a line
● volumetric elements in a 2D-painting, volume transfer
● line change depending on lighting, the transmission of light and shadow
● physically correct parameters when drawing objects: snap to plane, the mass of objects
● transmission of contrast by line, the glare display, refraction angles, reflections, and bends
● transfer of object texture, drawing patterns, and repeating objects
● line depth, the use of the line as a determinative of the objects distance from the viewer
● line hierarchy for individual objects, creating a readable and quickly perceived image of an objec