[3] Traditionally, students of the Old Masters learned how to paint by working in the style of their teachers.
This process of mimicking their master’s work would enable a student to practice a skilled mode of painting before developing their own approach.
Many famous artists employed this practice, including John Singer Sargent, Edgar Degas, and Pablo Picasso.
It is said that after Leonardo brilliantly aided Verrocchio in the painting of The Baptism of Christ, the master resolved to never touch a brush again[4] There are several issues related to art forgery and copyright violation that apply to the reproduction of oil paintings.
In the U.S., there is no copyright infringement that applies to a painting 70 years after the death of its artist.