With ZBrush 3.5, create at the speed of light with new sketching features:
QuickSketch allows you to draw your thoughts and ideas in 2D in a simple and elegant way to rough them out so that you can quickly find the best approach and move forward. ZSketch, combined with the improved ZSpheres II, adds the ability to freely create directly in 3D space, sculpting shapes and forms that you could previously only dream of.

Description:

ZBrush 4 offers the freedom to explore and create; take your art from concept to final production asset without the need to leave the ZBrush environment. You can also use GoZ to seamlessly transition between ZBrush and other applications. Your 3D creations are only as good as their presentation. Now ZBrush 4 includes an animation timeline allowing you to create moving turntables for your demo reel. Animate poses, store camera positions, sync your animation to music, import audio to test blend shapes and lip sync all within ZBrush. More than simply an animation tool, the timeline can also be used to store and switch between your model’s states for fast, easy control while working. For example, you can use points on the timeline to swap visibility of entire groups of SubTools, making project management easier than ever.

With enhancements to the already powerful features in ZBrush 4R2, the all new ZBrush 4R2b takes the potential of features like the BPR Renderer and its real time filters to the next level. You'll be amazed by the capabilities of the added functions in this latest version.

There you go! ZBRUSH 4R2B FULL and ZBrush 4R3 Updater. Completely working Zbrush 4 R3 for Windows