- David Beasley
- model shop supervisor: Short effects crew
- James Belohovek
- miniature production
- Beverly Bernacki
- optical effects
- Doug Beswick
- visual effects: sandworm sequence
- William S. Conner
- optical effects (as William Conner)
- Thomas Conti
- miniature production
- Jammie Friday
- animation production
- Spencer Gill
- optical effects
- Rick Heinrichs
- visual effects consultant
- Rick Kess
- miniature production
- Peter Kuran
- visual effects
- Tim Lawrence
- visual effects: Barbara/Adam transportation
- Jo Martin
- optical effects
- James D. McGeachy
- construction supervisor: short effects crew (as James McGeachy)
- Alan Munro
- visual effects supervisor
- Mark Myer
- animation production
- Sarah Pasanen
- optical effects
- Ted Rae
- visual effects: snake sequence
- Jacqueline Zietlow
- visual effects coordinator
- Jim Aupperle
- stop-motion camera (uncredited)
- Les Bernstien
- visual effects (uncredited)
- Lynette Eklund
- miniature wardrobe fabricator (uncredited)
- Tom Gleason
- miniature effects unit: model maker (uncredited)
- Steve Koch
- miniatures (uncredited)
- Stuart Land
- sculptor (uncredited)
- Mike Smithson
- stop-motion fabrication (uncredited)
- Michael Stuart
- model maker (uncredited)
- David Stump
- visual effects cameraman (uncredited)
- Chris Woodward
- visual effects camera assistant: VCE (uncredited)