Adobe Illustrator is not a paint application. It's a graphic design application.
Corel Painter is a digital paint application. [0]
Usage differences between these two programs is huge.
Usually paint programs lack filters, but specialize in brush macros, biasing behavior in favor of starting with a blank drawing areas.
Meanwhile image manipulation programs pretty much have a configurable airbrush and replicate some dark room techniques, and possess a rich filter library, biasing behavior in favor of altering and layering existing content together, after the original creative process.
Corel Painter is a digital paint application. [0]
Usage differences between these two programs is huge.
Usually paint programs lack filters, but specialize in brush macros, biasing behavior in favor of starting with a blank drawing areas.
Meanwhile image manipulation programs pretty much have a configurable airbrush and replicate some dark room techniques, and possess a rich filter library, biasing behavior in favor of altering and layering existing content together, after the original creative process.
[0] http://www.corel.com/