I never noticed the change of shirt or space suit. I think my standards are low.

The digital fixes to replace the scaffolding that have been on YouTube are pretty decent. Kirk’s face is basically pasted into the helmet so I reckon with enough dedication it would be possible to trim the scene where he catches Spock so that the suit close up matches the earlier scene.

I want to tweak the scene in Kirk’s quarters where he and McCoy are viewing Decker and Ilia to include Janice Rand just because I lament that she disappears completely from the second half of the movie.

I’ve already identified that there is a frame where McCoy exits the quarters in their earlier confrontation where you could easily paste a close up of Rand but Deepfake and Deep Video Portrait need to bed in a bit more before any attempt. There is dialogue from TOS appearances that could be added to pad out the scene, albeit logistically tricky:

Rand: “Can I get you something from the galley, Sir?”
Kirk: “Thank you.” [Balance of Terror]
Rand:“Do you suppose she knows?” [Miri]
McCoy: “Jim, she may not know or even remember.”[Spock’s Brain]
Kirk: “Its all we’ve got.” [Wrath of Khan]

It’s a largely pointless exchange since Kirk’s voice-over pretty much already tells us this but I just want Rand to be more visible than her tiny cameo at the start of the film and this underscores her previous role as Kirk’s assistant. It also looked easier than trying to paste her on the bridge during the V’Ger flyover. I have worked out that it would just about work to paste her exiting a Turbolift but the background in the transporter room is so dark, getting her hair to look natural is a problem.