Definition: Vtkk, also spelled as "viktork," is a term in Russian for a type of painting technique used by artists to create dramatic or abstract effects on canvas or other surfaces with colored pencils or charcoal. It involves applying thick layers of paint that change colors gradually and are applied with brushstrokes, often resembling the strokes of a painter's finger on canvas. Vtkk is an important element in Russian art history for its deep influence on modern art and design.