Back in 2010, we looked at Luminance HDR, a
standalone application for creating and editing high dynamic range
(HDR) images on Linux systems. At that time, Luminance was a
technically capable tool with a byzantine user interface that often
got in the user's way. In the intervening two years, the program has
made strides, although it has yet to break through the easy-to-grok
barrier. But it still remains one of the best applications in a small
set of open source options.