Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License. Blender can be used for 3D modeling, animation, rendering, post-production, interactive creation and playback.

Features:

 

Interface:

• Flexible and fully configurable window layout with as many screen setups as you prefer

• Any window space can be easily switched to any window type (curve editor, NLA, 3D view etc)
• Built-in text editor for annotations and editing Python scripts
• Graphical user interface for Python scripts
• Custom themes

Modeling:

• A range of 3D object types including polygon meshes, NURBS surfaces, bezier and B-spline curves, metaballs, vector fonts (TrueType, PostScript, OpenType)
• Full multiresolution sculpting capabilities with 2D bitmap/3D procedural brushes (Paint, Smooth, Pinch, Inflate, Grab) supporting symmetry
• Mirror modifier with middle vertices clipping and automatic deletion of inner faces

Animation:

• Armature (skeleton) deformation with forward/inverse kinematics with pole target support
• Auto IK allows posing FK chains easily
• Non-linear animation editor for mixing individual actions created in Action editor
• Character animation pose editor
• Timeline offers fast acces to many playback functions, autokey, help markers

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