Conversation so far:
What is significant about Cameron's early career?
Making rapidly produced, low-budget productions taught Cameron to work efficiently.
What else did he do?
He soon found employment as an art director in the sci-fi movie Battle Beyond the Stars (1980).

Question: Is there anything else significant?
Self-contained rewrite: Aside from James Cameron being an art director in the sci-fi movie Battle Beyond the Stars, Is there anything else significant?