Depth of field was a real problem. Even though you have tons of DoF in S8 vs 16mm or 35mm, when you're shooting nearly wide open the field of focus drops off to nearly nothing very fast, meaning I needed the starfield very close to the model, so I couldn't get much in the way of 'receding into distance' stuff.
One thing I did in the extreme opposite way for shooting ship models -- and I don't know of anybody who has tried this, except I think they did it for the approach/landing shot in FORBIDDEN PLANET -- is shooting the spaceship miniature in broad daylight, with a large practical starfield a ways behind it, all of the elements backlit by the sun, and underexposing a couple of stops to keep the black mount from showing (not always successful, since it would occlude stars and show a back 'edge.')
The upside of this was nearly infinite depth of field, plus having a source that was really at infinity, so you didn't have problems with using multiple sources acting as a single sun source, which is hard to make work (and increases problems with poles showing, since you have multiple lights casting illumination and shadows during a shot.)
If I had the logistical means to do so, I'd've had a giant pole running out the off-camera side of the ship through the starfield to a car and just drive the miniature from the starfield to camera, hoping that by shooting highspeed it would smooth out the bumps. But that would have carried a lot of potential for disaster -- hardcore blooper material.
Yeah, shooting everything single-pass was the most phenomenally labor-intensive aspect of scifi filmmaking in the alleged good ol' days. Some of the best results I ever got for doing silly shots (like a space shuttle making an abrupt U-turn against a blue sky), was by simply turning the camera at right angles and throwing a model so it would make an arc -- the perspective made it look like a horizontal move, a U-turn, and the speed looked right while the shot pretty much looked like it needed a tire screech, it was so funny in style.
I don't know if his stuff is on youtube or not, but in the late 70s through the mid 80s, a guy named Lew or Lou Place in Long Island made a bunch of SPACE 1999 movies. SOME of his fx looked like Brian Johnson's stuff, like an EAGLE flying through a cloud bank. Some of it looked hokey ... and a few shots looked better than the real thing. I think I'll go looking to see if any of that stuff is online, just to see if my memory is playing tricks on me. I remember a friend who saw Place's setup telling me that he had HO scale trains on tracks above the Eagle, and wires/strings that led down to the miniature, which was driven through frame by the train engine. Depending on how you bent the HO track ('flex' track could be configured into almost any configuration), you could put the eagle through all kinds of turns and the like -- and assuming you could avoid seeing the wires, you could do some awesome stuff. again, all in-camera.
Man, this must all read like an article from Super8Filmaker, the periodical that, while dead by the early 80s, was responsible for costing me nearly all of my non living expense income from the late 70s through the early 90s.