> Instead of creation of a new format, a possibility might be to extend
> OpenEXR to handle layers.
and extend it to adjustement/filter/.. layer, handling metainfo, path...
And last but not least, OpenEXR is a full binary format, and only pixels 
should be stored as binary, metainformation, path, and so on must be stored 
as text.
-- 
--- Cyrille Berger ---
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