Folks reasonably assume footage from behind-the-scenes featurettes are “truth”, but it is now standard practice for studios to alter footage from “making-of” videos.

(These gray screens are actually blue screens on the set of “Superman” (2025).)

Here's the literal opposite: garbage YouTube channels steal VFX reels from VFX shops and host them on their own channel create completely false thumbnail images.

For example, Michael B. Jordan was NOT filmed against a bluescreen for this shot in "Sinners" - that's a completely fabricated image.

@tvaziri that is surreal. Never seen the inverse done. Like, I just can't fathom why

"come on, todd - nobody sees stuff like this and jumps to wild conclusions about how movies are made and then makes extremely simplistic YouTube video essays spreading misinformation and then tens of thousands of people get bad information about how movies are made"

me:

@tvaziri I know what you’re saying in all this (and really appreciate the fight you are in) but that blue superman suit against a blue screen gives me the Willies. Much of blue/green screen ends up getting roto’d in the end either way. But why do you think they didn’t use green for this scene at least? I’m a comp artist, with not much on-set experience. Help me understand.
@tvaziri is that so folks can’t “easily” use the bts footage and replace the blue screens with whatever they want?
@tvaziri Crazy thing is... it's true. The movie, the marketing. All of it. It's all make-believe.

@tvaziri Why do I have the terrible feeling that “blue/green screen” = bad therefore they change it in the making of scenes so people get less upset?

Even though it’s still exactly as real as it was/wasn’t before.

@tvaziri what is their motivation for modifying the behind the screen footage? Does it make a difference if the backgrounds are gray instead of blue in this case?
@adeese they want to de-emphasize visual effects
@tvaziri what I can't wrap my head around for this, is that Gunn's wearing a Superman shirt, and there's that guy in the blue shirt, so apparently they had to spend time rotoing those elements to keep them blue.
@tvaziri the CorridorCrew did a segment on this too (though with their examples mostly focusing on Barbie).
Before you continue to YouTube

@tvaziri
Sorry if this is a dumb question. Is this just a bit of trivia? Or why does this matter?
@ryanjyoder desaturating the blue screens makes it less obvious that they're creating synthetic backgrounds for shots - they are pandering to the "CGI bad!" crowd
@tvaziri
Interesting. I didn't even know these people existed. To each his own I guess....

@ggete Si tu l'as pas vue, je recommande à ce sujet l'excellente série "No CGI is really just invisible CGI" qui parle notamment de ces making of trafiqués, particulièrement celui de Barbie qui va jusqu'à remplacer les fonds bleus par de faux décors... DANS LE MAKING OF (pour faire croire à des prises réelles).

https://www.youtube.com/watch?v=7ttG90raCNo&list=PLgdTaHO8FLEve_XFiRBEcOSkRdd-Txjne

"NO CGI" is really just INVISIBLE CGI (1/5)

YouTube
@tvaziri So now we need “The making of making-of” videos.