Danfun128 said:

DrCrowTStarwars said:

...They only went the CGI route because the original negatives for the special effects shots were lost so those could not be restored and broadcast in HD like the rest of the content...

Explain the original shots being used in the blu-ray's then...

They don't have the separate effects elements, only the final composite. They can scan the composites in HD and show them to you (as you note: they do), but they can't scan the original elements to recomposite for a remastered look.