There are a few explanations for why the CGI used on She-Hulk in 
She-Hulk: Attorney at Law is not as effective as that used on Hulk. The upcoming MCU Disney+ show features She-Hulk for the first time ever in live-action through a combination of Tatiana Maslany’s performance and CGI. This has brought up some issues regarding She-Hulk’s VFX compared to Hulk’s.,The trailer introduces Jennifer Walters/She-Hulk, lawyer and cousin to Bruce Banner/Hulk, to the MCU. Walters works for a “super-human law division,” and Tim Roth’s Emil Blonsky/Abomination, last seen cage-fighting with Wong in
Shang-Chi, looks to be among her clients. While the trailer does not reveal how Walters gained her powers (in the comics, she receives a blood transfusion from Bruce Banner after getting shot by the mob), it does show Hulk training Walters to control her powerful alter-ego. One part of this training looks to involve a trap straight out of a
Saw movie, complete with spinning blades. Plenty of shots have both Hulks together, in all their green glory, but the effects on She-Hulk herself have received criticism for looking unconvincing, especially when put next to her cousin.,Related: She-Hulk’s Trailer Flipped Age Of Ultron’s Worst Iron Man Joke,There are several reasons that She-Hulk’s CGI is harder to get right compared to Hulk’s. Firstly, the design for Jennifer Walter’s green alter-ego is far more recognizably human than Banner’s. This means that it could potentially fall into the uncanny valley for viewers. The uncanny valley is a concept where the more a humanoid object, such as a CGI character, looks human without being human, the more off-putting it looks. Secondly, She-Hulk is an all-new character; therefore, VFX artists are having to work from scratch. Ruffalo’s Hulk has been in the MCU since 2012’s
The Avengers, so the VFX teams have had a lot of practice working on that character and have plenty of reference material to use on top of that. Since
She-Hulk is Tatiana Maslany’s first MCU project, the VFX artists have no such luxury with Jennifer Walters.,Although there have been many different versions of the Hulk in the MCU over the years, such as 
Avengers: Endgame’s Smart Hulk, they have all looked similar. Standing at a superhuman height and having shoulders as broad as a house, the Hulk has never looked especially human. By comparison, She-Hulk stands at 6’7”, a height well with human possibility. She looks more like a green-tinged human than Hulk ever has and so falls into the uncanny valley much easier. Her design is much harder to get right because it is much more recognizably human than the Hulk’s.,While She-Hulk’s design is difficult for VFX effects artists, it is not impossible. The
She-Hulk trailer was released with months to go before the actual series is set to launch on Disney+. As such, the footage shown off in it may not be final, as Marvel has a tendency to continue with reshoots and CGI work until near the release date. The trailer also stayed away from revealing a lot of plot elements and did not feature Jennifer Walter’s trademark fourth wall breaks from the comics, and may not be truly indicative of what the final show has to offer. There’s plenty of time for
She-Hulk: Attorney at Law’s CGI to be refined to a point where Jennifer Walter’s alter ego can look as good as Banner’s onscreen.,More: She-Hulk Proves Marvel Really Doesn’t Care About The MCU Timeline,She-Hulk: Attorney at Law debuts August 17, 2022, on Disney+.