I just found this tool Cinepaint, looks to run on X on mac, and natively on Linux, and appears that a windows version is coming.
Sounds like an interesting editing tool...seems often used in movie houses to do cleaning of frame by frame stuff...and high bit functionality.
From the description:"CinePaint is used to retouch feature films and in pro photography. CinePaint opens high fidelity image file formats such as DPX, 16-bit TIFF, and OpenEXR, and conventional formats like JPEG and PNG. It has a flipbook for movie playback of image sequences in RAM. It supports 8-bit, 16-bit and 32-bit color channels, HDR and CMS.
CinePaint is used for motion picture frame-by-frame retouching, dirt removal, wire rig removal, render repair, background plates, and painting 3D model textures. It's been used on many feature films, including The Last Samurai where it was used to add flying arrows.
For still photography, CinePaint can import bracketed HDR exposures. It has gallery-quality 16-bit per channel color printing with GutenPrint. CinePaint's high dynamic range is crucial with B&W still photography, where images only have a single channel."
I was wondering if anyone here was familiar with this or had tried it out with HDR or other type of image manipulations?
I have been playing with a linux install on Parallels on my mac, thought I might give it a whirl, or install it on one of my native linux boxes, but thought I'd see if anyone knew of this, had used it and could give some feedback on their thoughts on it...
Links to some screenshots:http://www.cinepaint.org/more/pix/index.html