Version 6.0 of SketchBook Pro promises a streamlined interface. Multi-touch navigation in the application is aimed at keeping artists immersed in the creative process, developer says, while new guide tools such as French curves should help create more precise strokes in the app.

The updated application boasts more than 100 preset tools in its brush library. SketchBook also includes synthetic paint brushes and smudge brushes to allow for more color blending. Other features in the new version include the ability to adjust the brightness, contrast, hue, saturation, color balance, and grayscaleand also the option to invert the image.

The app was designed for Mountain Lion, Apple's recently released version of OS X, though it will run on Macs using OS X 10.6.6 or later. SketchBook Pro 6 includes support for Documents in the Cloud so that artists can save their files directly to iCloud. This lets them access canvases from the iOS versions of SketchBook, or any other computers of theirs with SketchBook Pro 6 installed.

If youve got a MacBook Pro with Retina Display, SketchBook Pro has been updated to take advantage of that higher-resolution screen. The programs App Store description additionally says that its specially designed to take advantage of pen tablets, including Wacoms Bamboo, Intuos, and Cintq offerings.

Users of SketchBook Pro 5.0 and later wont be able to upgrade for free: Autodesk considers this a new version of its application. Version 6 is currently available for $30thats an introductory price, the company told .