My advice is that you check your card performance before buying Painter and do the 30 days free trial to check if you your computer can handle it. I always do the free trial before buying into any program.
The result from the panoramic photo below
To the Digital Painting using Corel Painter 2015
Corel Painter 2015 is in my opinion one of the most advance digital painting program.
To get Perfect Effect 4 for Free click on the link on the right of the page