Some equatorial maps for you.
I've created them all with a properly licensed Bryce7Pro.
there is about 10 different sky maps packed, some with landscape as well.
Including UV mapped World sphere - useful for Blender game engine, or just to have sky around the viewport when working.
It also can be used as enviromet maps in cycles.
Can u write how can I generate this maps in bryce in HDR format, please?
Thanks, they also work in the World slot of Blender Internal as well.