Apparently, Mark Vaz book Into the Digital Realm says they used the O-neg for the live action photography, they used Interpositve and YCM separation masters and they printed the cgi segments back out to film it had high resolution it didn’t say how many whether 2k or higher. They located the original Optical effects pieces that didn’t include the 86 lost shots on CRI stock and they redid those, and those are the recomposites the original pieces.

So unless you consider recomposites to not be original if you didn’t cut in those new cgi redoes you basically have the original except for having to redo those 86 shots.

Its more and more clear to me it would have been possible in the 1990s and certainly would be now. We were lied to.