User blog comment:Atarumaster88/EfFEctive 7 November: No More Old Covers/@comment-20644-20091109172200

Save for the basics and the dialogue of such scenes, action scenes that require a lot of special effects (*cough*prequels*cough*) are typically directed during post-production and not fully flesh out in the script. Lucas even joked on some ROTS behind the scenes documentaries that the Anakin/Obi-Wan duel on Mustafar just said something like, "And then they fight."