Some of the deleted scenes were finished with cheap outsourced cgi not ILM.
Not all, some of the scenes on Sith were left unfinished.
None of the blu ray scenes were ever finished. Including the original trilogy.
Except for Luke's lightsaber in Return of the Jedi being built. The only scene i know of that was actually in along with finished sound effects dialog and music. Then removed. And not in the premiere but finished.