Along with all the features that artists love to use: layers, realistic media.
BS Editor: TwistedBrush Open Studio has all the great features of TwistedBrush Pro Studio but just a handful of the very fine brushes included and without brush editing ability, all for FREE. Additional collections of brushes are available for purchase.

Features:
Layers and Transparency
Masks
Cloning
Tracing Paper
image Format
Drawing Tablet Support
Drawing Guide
Powerful Brush Engine
Brush Editing
64 Bit Imaging
Image Processing Filters
Lua Scrpt Filter
Extensive Tool Set
Color Palettes
Many More Features you can free download TwistedBrush Open Studio 16.24 now.