Painting with pigments bound in drying oil, the dominant medium of European painting since the 15th century. Some generative artists use robots or plotters to paint in oil.
Without the invention of a technique such as oil painting we wouldn't have Van Eyck's Ghent Altarpiece.
AA Cavia, AA Cavia on Summoning Worlds
Before the Internet, if you wanted a beautiful handmade oil painting, it was no easy task. You had to hope there was an artist in your vicinity who had the right piece in their inventory or was willing to take a commission.
John Maeda, John Maeda on Computational Evolution