whew...
It took me a little longer than I thought (a bit over 8 years looking at the thread's start date), but I found it!
DAP => Dynamic Auto Painter, a follow-on commercial software to the freeware "Archimbolder" by
Roman Cortes (2008) and named for painter G. Archimboldo and seeming to suggest that it's a little <something>-er more than his style which was "creating portait heads made of fruits and vegetables." (Really, by creating portraits composed of tinier paintings of fruits and vegetables.)
Archimbolder is extensible by way of "object packs", thus:
AOP => Archimbolder Object PackThe
AOP file format is open-source, and other artists have added their contributions.
(I also found out that Lyle is fairly famous for his works in this genre. And _I_ have interacted with him on GimpChat. [Breathe! Just breathe!])
Thanks, Lyle.
Note: I could be Entirely Rong about all this.
EDIT: Incidentally, I did search for DAP and AOP on GC before hunting/posting and found nothing. If only I had searched for Dynamic Auto Painter...
Unfortunately, after posting, I went back and tried to download archimbolder02.zip from romancotes.com link only to find it broken. An attempt to get it through archive.org also failed.