CinePaint is a painting and retouching tool primarily used for motion
picture frame-by-frame retouching and dust-busting. It was used on THE
LAST SAMURAI, HARRY POTTER and many other films.

CinePaint runs on all popular flavors of Linux and on Mac OS X as an
X11 application. The Windows port of CinePaint is currently broken,
sorry.

CinePaint is different from other painting tools because it supports
deep color depth image formats up to 32 bits per channel deep and ICC
style colour management.

CinePaint was originally based on GIMP and consequently is a GTK1-based
application. A new FLTK-based version of CinePaint, called Glasgow,
is nearing alpha. There's also a new image core in development, called
img_img, That will enable CinePaint to operate on images from the
command-line and to integrate with other projects such as Blender.

Support from the film industry launched development in 1998. Motion
picture technology company Silicon Grail (later acquired by Apple) and
motion picture studio Rhythm & Hues led the development, with a goal
of creating a deep paint alternative to the recently discontined SGI
IRIX version of Adobe Photoshop and to support the emerging Linux
platform. Although continuously in use in the film industry, it
never had much awareness in the open source community. On July 4,
2002, Robin Rowe released CinePaint as a SourceForge project.