Most Helpful Guy
A professional artist's art from the rest of lower level artists?
The ones I can think of would be...
1.) Style. Professional artists often make their own style. Lower level artists do art in the style of the professional artist. Chuck Close for instance has a unique style. He is a professional. (Chuck Close's art below)
He may have had influences from other artists, but he made his style very unique.
2.) Ability. Sure, you may be unique in your style but you have to be talented. One could make a case that some abstract art doesn't require much ability, but I always considered that stuff kind of crappy anyway lol. High school artists may have talent but they lack the other aspects.
3.) Creativity. You need to have great ideas. No taking pictures from the internet and just redrawing them. You have to reimagine things. You need to take a sketch and make an interpretation.
4.) Fame. In the end of the day, you need to make your art known. Marketing, selling art, making art on a regular basis is all part of this.
Most Helpful Girl
Networking. It's oftentimes who you know that gets you "discovered".