Now that actors who are alive today, knows about it, they can put it in their Last Will, or any other legal documents, giving the option of if they don't mind their images are to be used or if they do not want it done.
Plus as far as I can tell, before using late actor's images, the film makers would have to seek permissions from the late actor's children or grandchildren, something usually done when it comes to the fact that film makers wants to turn a novel into a movie, but need permissions from the children/grandchildren of the late author, so I guess same thing applies to using images.
If I was an actor and I passed away, I would expect film makers to ask my children if the film makers can use my image as a CGI part in a movie, after all, don't newspapers tend to seek parents permissions before publishing images of children who died, in newspapers?
