Warbler said:

What do mean the TOS space scenes look bad on the BD? May I remind you the special effect scenes done in the 1960s? Do they really look better on the DVD or is it just a problem of going from the HD non-space scenes to the non-HD space scenes?

It's a problem of going from the non-space scenes, which have cleaned up really well, to the space scenes, which haven't. That's what I meant when I said that watching the DVDs was less jarring. I'm not saying that the effects look bad because they're dated.

huh? so what Chewtobacca wrong when he said this?

Chewtobacca said:. I wish TNG were in the same situation as TOS and that only the space scenes were done on video, but it's not the case, and I really don't see how including the original effects is feasible.

if the TOS space scenes were done on video, how were they able to get transfer them to HD?

I didn't mean to imply that TOS space scenes were done on video. I meant that I wish that TNG and TOS were in the same situation in terms of seamless branching because if the only scenes with video effects from TNG were the space scenes then branching might be possible. Sorry, I should have been more precise. Doubleofive is right: TOS space scenes were on film.

@Tobar

The information you posted sounds very promising.