There was a magazine that came out at the time of Return of the Jedi that had lots of “making of” and EU info (before there was an EU). One thing I remember about it is that it included several early concept images for Jabba the Hutt, including one or more versions with multiple legs. I’ve been looking for those leggy concept drawings but all I have been able to find is the maquette on the left of this Japanese postcard (the text on the back of the postcard auto-translates to “Instead of creating design drawings for the many aliens that appear in “Return of the Jedi,” the sculptors created maquettes (templates) from which George Lucas and the directors selected the designs to be used. All three are prototypes of Jabba the Hutt.”).
The magazine may have had only a photo of the maquette, but I thought I remembered a concept drawing. I’d like to see the images from that magazine, and/or the magazine itself.
From the text if the magazine I think it described Jabba as bloated and diseased, with most Hutts being thinner, which obviously isn’t canon now. And it also had a segment describing cloning in the clone wars. And some of the pages were in landscape orientation. There were copies left on the shelves at my local Sky City for literally years after it was published.
