At the end of 1996, in time for Christmas, Sega released a special edition of Nights called "Christmas Nights Into Dreams" that featured new levels and a lot of extra stuff. The CD, made in limited edition only was not marketed (if not in a limited edition Christmas Nights Sega Saturn Package) and soon became a very rare item (also if after Xmax was sold for nearly 500 Yen, new!). The following year a UK magazine (the official "Sega Saturn Magazine") re-released this game as a special cover cd gift for their readers.
Using the CD on a PC or Macintosh computer revealed another surprise: it has a special folder called "Extras" in which there are two beautiful pictures made by Sega for the game (in both 16 M and 256 colors). In this page you could see them and even download them!

CLICK HERE TO SEE (AND DOWNLOAD) THE FIRST PICTURE IN 256 COLORS

CLICK HERE TO SEE (AND DOWNLOAD) THE FIRST PICTURE IN 16M COLORS

The second picture.

CLICK HERE TO SEE (AND DOWNLOAD) THE SECOND PICTURE IN 256 COLORS

CLICK HERE TO SEE (AND DOWNLOAD) THE SECOND PICTURE IN 16M COLORS

Originally all the pictures were on the BMP-Windows format: I have converted them in the more common (and economic in hard disk space...) JPEG standard.
Thanks to George F. Palamara that gave me some additional informations on the Japanese version