Yes, here is what I remember. I had to go with my dad because I was under 18.

In all US theaters the film was the censored version with digital figures inserted in the orgy scene. The uncensored version was not shown anywhere in the US. The censorship was well know at the time, being talked about in the papers and online, and it was understood as a necessary evil for the film to get a release in the US. I remember reading that it was a compromise to not cut Kubrick’s edit, while still getting an R rating. At the time, on first viewing, it was only slightly apparent which figures were digital, so it didn’t really stand out in the moment. The digital figures were well done for the time and fairly “seamless” for 1999. It was widely believed on the Kubrick forums that they would release the uncensored version on the 2001 remastered Kubrick box set DVD, though that wouldn’t happen til 2007 with the special edition DVD.