There was also QuickDraw 3D (not QuickTime, and not cross-platform), Apple's 3D graphics API, which used actual 3D rendered objects.
Classic MacOS had pretty well-integrated support for QuickDraw 3D Metafiles, they could be dragged and dropped, you could embed 3D objects into a word processing document or presentation or something and manipulate and explore them in there.
Kind of mirrors what Apple is doing with USDZ these days (you can send a USDZ model in iMessage and the recipient can manipulate it right there in chat)
Classic MacOS had pretty well-integrated support for QuickDraw 3D Metafiles, they could be dragged and dropped, you could embed 3D objects into a word processing document or presentation or something and manipulate and explore them in there.
Kind of mirrors what Apple is doing with USDZ these days (you can send a USDZ model in iMessage and the recipient can manipulate it right there in chat)