.. meta:: :description: The EXR file format as exported by Krita. .. metadata-placeholder :authors: - Wolthera van Hövell tot Westerflier :license: GNU free documentation license 1.3 or later. .. index:: *.exr, EXR, HDR Fileformat, OpenEXR .. _file_exr: ====== \*.exr ====== ``.exr`` is the prime file format for saving and loading :ref:`floating point bit depths `, and due to the library made to load and save these images being fully open source, the main interchange format as well. Floating point bit-depths are used by the computer graphics industry to record scene referred values, which can be made via a camera or a computer renderer. Scene referred values means that the file can have values whiter than white, which in turn means that such a file can record lighting conditions, such as sunsets very accurately. These EXR files can then be used inside a renderer to create realistic lighting. Krita can load and save EXR for the purpose of paint-over (yes, Krita can paint with scene referred values) and interchange with applications like Blender, Mari, Nuke and Natron.