An artist's brain is working very much like VRF. It does not know what ideas will arrive in the next moment, in what sequence. It does not know if it will be a valuable idea in advance. But an artist's brain does know how to arrange ideas, so that they become valuable. One after another they will arrange to follow a common trend, which eventually form a recognisable pattern. Out of this pattern the artist builds something unknown beforehand, and at the same time very familiar to the world.