Photoshop File Format !!install!! -

Despite Adobe publishing a PSD specification in 2006 (last updated 2015), several obstacles remain:

This section is the heart of PSD’s capability. It begins with a (4 bytes), followed by: photoshop file format

As a result, no open-source implementation fully supports writing all PSD features without data loss. GIMP, for example, will flatten certain adjustment layers on import. Despite Adobe publishing a PSD specification in 2006