Art skills and Craft skills have been updated to show how they intersect with each other and are related. Art is about creating something new, innovative, and interesting. Craft is about creating something consistently and the speed of that production. Art feeds Craft. The original, beautiful, engaging, or clever objects and works created through Art are reproduced to scale using Craft skills.
Art skills all have a Craft skill that is the prerequisite skill. This is because skills are generally taught via repetition, with creativity coming later, once the basics are understood.
All Craft skill have a corresponding Art skill that is used when the character is trying to be creative. Without the Art skill, the character is just able to replicate what they have done before using their Craft skill, though improving the Craft skill will speed the rate of reliable reproduction.