I have developed a huge interest in archaic film techniques and I am wondering, back in the late '70s when they were making Futureworld what was the process by which they transferred this digital animation onto film? Is there a name for it or a place you can point me that might describe the technique?

I am really just clueless as to how something like the whole wireframe Death Star trench prep sequence in Star Wars was composited onto 35mm film stock.