Just flip the image in post.
Technique used in major motion pictures all the time.
Neil deGrasse Tyson famously noted that the stars visible in the night sky in Titanic were in the wrong places. And James Cameron equally famously moved them to their historically accurate positions (with special effects, I assume) and rereleased the film.
It was far worse than that. It was a generic field of stars, vaguely reminiscent of real constellations, and the left half of the screen was a mirror of the right. For a film whose marketing included boasting about insane levels of historical accuracy, it was worth pointing out.
Good idea! Flip it upside down, now the sun is rising into the ocean. Problem solved!
You assume? As opposed to what, sending inconceivably powerful weapons into deep space in order to move the stars into their ‘correct’ positions, then reshooting the scenes? 
Moving stars would require one bad-ass gravity pump. And we’d need all the money on Earth to…
time skip
Maybe the effects weren’t all that special.
You’re right. That’s what Kubrick would have done.
Why go to the trouble of moving the stars? Much easier just to change the shooting location so that the stars are already in the correct locations.
Never mind.
A pizza delivery guy from the 20th century could do it.
Alec Baldwin Sues ‘Rust’ Armorer and Crew for Giving Him a Loaded Gun
Note the full legal document, which has some interesting information about the production:
Interesting they redact the email addresses but not the phone numbers. Prevents fan or rant messages, I suppose.
Here is the 551 page report:
What took so long? I feel they’re responsible.
It would be like a mechanic giving me the car keys after a brake job. I leave the shop and the brakes fail 4 blocks away. Someone is run over. I trusted the mechanic to do his job correctly.
Who gets charged?
Who wants to take one for the team and read 551 pages and point out the highlights? I couldn’t even understand what the first few pages were about. It’s been awhile since I tried, but I thought you could search a PDF. No luck on this one.
Don’t worry, the 551 page report includes about all the phone numbers and email addresses of just about everyone who worked on the production. So if there was a producer you wanted to discuss your latest movie idea with, or wanted to call up armorer and ask her for a date or talk to an FBI specialist about the gun Alec used–the contact information has all helpfully been provided–although not indexed.
mordecaiB, did you read the lawsuit I posted a few posts up? That provided much better information:
I wasted a couple hours browsing through it and it’s not worth the effort. I expected a major summary of the information but it isn’t there: it’s summaries of interviews, lists of evidence… While supposedly they have been investigating this tragedy for well over a year virtually everything is from 2021.
mordecaiB, just do a search of Google News for Alec Baldwin Rust limited to last 24 hours/week and read some of the articles–and the articles will just mention minor tidbits and not add anything significant to what you already know–like the Deadline article I cited.
Not that it matters much, and nothing personal, but this is a flawed analogy, IMHO. Although the mechanic clearly bears some, perhaps most, of the blame, I believe that in most jurisdictions the operator of a motor vehicle is responsible for the condition of the vehicle. And it is certainly possible to test the brakes before driving off the mechanic’s property, to make sure they did the job correctly.
OTOH, Baldwin was obviously not able to test the gun before handling it. He relied entirely on the expertise of those responsible for the preparing weapon, and followed the standard procedures on a movie set in such situations. The armorer and AD share 100% of the responsibility.
How that responsibility will be divided between them is TBD, but it would seem that by somehow allowing live rounds on set in the first place, the armorer deserves a larger share.
Only only wisp of responsibility that Baldwin – along with all the other producers – might bear is not hiring a more experienced armorer to begin with, or not taking some action when the previous incidents of unintended discharges occurred, if they were aware of them.
Yes, that was much easier to understand. Plus, I found out Baldwin’s name is Alexander, so all those times I typed his name as Alex, I was right. 
From what I’ve read about all the negligent discharges on the set, including at least one by the armorer, the DA was obviously doing a money grab by asking for a half a million dollars to investigate the case while hinting that Baldwin could be charged. As far as I can see, there is nothing in the current stories that we didn’t know in the first couple weeks after the shooting.
We knew there was live ammo on the set and where it came from. We knew there were several cases of negligent discharge on the set. We knew the armorer was inexperienced/incompetent. We knew both her and the AD cleared the gun for use in the scene.
If this case hadn’t had Hollywood and money attached to it, charges would have been laid a long time ago.