Version: 4.5.3 - May 24, 2006

    * Initial 64 bit Linux Release (support for Flame, Inferno and Burn2 on Linux)
    * Produces more precise results on 12 bit sources
    * Burn version must be same as GUI version 

Version: 4.5.2 - November 29, 2005

    * Added support for 64 bit Discreet Systems for Irix.
    * After upgrading your Irix plugins to Twixtor 4.5.2, you will also need to make sure any Burn licenses are also updated to Twixtor 4.5.2. 

Version: 4.5.1 - June 24, 2005

    * Linux support added.
    * Fixed a problem with some values for the InvMatteChoke setting that caused layers to be incorrecly calculated.
    * Fixes a problem with "source" time being one frame off.
    * New optimized Batch Mode is 2 seconds per frame faster.
    * Update required by IRIX users to use Burn 

Version: 4.5 - April 12, 2005

    * Completely rewritten motion estimation engine. Twixtor is much more accurate, tracks objects farther, and exhibits fewer artifacts when there are objects crossing in the scene.
    * Support for marking material so that Twixtor does not motion-interpolate inappropriately across a cut or other transition, allowing Smoke and Fire users to quickly setup a retiming for a long sequence with multiple cuts without having to cut it into pieces first.
    * Contains an option to remove motion blur when slowing footage.
    * New warp modes Forward Warping and Inverse Warping with Smart Blending (as seen in RE:Flex) to avoid artifacts at the edges of the frame.
    * Option to switch between Source time, Output Time, Foreground and Background views.

Version: 3.0.1 - 5/3/2004

    * Fixed a bug on machines with 4 or more processors. Now verified to work with Smoke and Fire 6.0. 

Version: 3.0 - 4/6/2004

    * Update is free for Twixtor 2.0 sparks users; simply use your Twixtor 2.0 sparks key
    * Added multiprocessor support
    * Support for batch
    * Fixes a bug with retiming and motion blur with Fields Out
    * Menus and buttons with more dynamic show-hide
    * Separated in 2 sparks, Desktop and Module, to eliminate occasional crashing problems
    * Motion sensitivity allows the user more control than in the previous version. This setting now varies smoothly rather than jumping in discreet steps. 

Version: 2.0 - 4/4/2002

    * Updated support for speed remapping, in addition to previous versions' ability to frame remap.
    * Note the meaning of Vector Quality setting has changed slightly. Read the documentation for the new meanings.
    * support for foreground/background separated tracking via a user-supplied mask
    * handling of fields
    * supports batch mode
    * control over the limits of how far a pixel is allowed to move
    * support for alternate source for tracking 

Version: 1.4 - 

    * Updated support for speed remapping, in addition to previous versions' ability to frame remap.
    * Note the meaning of Vector Quality setting has changed slightly. Read the documentation for the new meanings.