A 15-minute sci-fi short film called "C" is viewable online at Vimeo (link below) and while it is the topic of another thread
, its approach seemed to be something worth bringing up here for fan filmmakers.
"C" is about a mutiny on a spaceship, and while the merits of the story are debatable, what's of particular interest here is that the film was made largely in the old-school way: sans CGI effects, no greenscreen. The effects are in-camera and the sets are lighting are practical. Even the spaceship shots feature miniatures which are shot with an ingenious substitute for a motion-control rig.
The film (link)
And article about the making of it