Figured I’d be as descriptive as possible in the title to save people time if it wasn’t what they were thinking.
Here is an example. Lifted it from a friend’s myspace page.
I believe this is what you are looking for: http://bighugelabs.com/flickr/warholizer.php
Dog80, thanks for that cool link!
One hour to find the answer. I love this place. I’m curious how Dog80 found that. Or were we just lucky that he/she already knew the answer?
But is there one that superimposes the museum setting, complete with visitors looking at the art, too?
Very cool program you found there, but for all the googling in the world I can’t find the museum wall thing. I actually didn’t notice it was a fake image, thinking my friends were the people in the photo looking at the wall, until I looked close at the piece of work they were looking at… and went “duh… its them.”
Is it possible he did it himself, with Blender or something?
Did Warhol do any paintings with this arrangement, 4x2, rather than greater numbers of images? My thinking is that it’s superimposed over another artist’s work, in which case, good luck finding it!
I sawthis episode of “I Want That” on Fine Living or HGTV that featured this company, All Pop Art, that does the same thing. You can upload your photo to their site and they’ll mail it to you. It’s pretty cool, but I haven’t gotten around to ordering anything yet.
I’m pretty sure he didn’t do it himself… Just the fact that there are people around staring at this thing and there’s a pretty much perfect shot of them doing so makes me think it was just a process like green screen for TV.
Here’s a website that does that.
No, I googled it. I guess my google-fu is strong 
Thank you much all, I’ll definitely use both apps in the future.
those are sweet websites, I spent a bunch of time on both 
nice finds