After the backlash surrounding Johanssons role in the film, producers reportedly attempted to quell the controversy with an old standby Hollywood uses to fix a lot of problems: CGI.
According to multiple independent sources close to the project, Paramount and DreamWorks commissioned visual effects tests that wouldve altered Scarlett Johansson in post-production to shift her ethnicity and make the Caucasian actress appear more Asian in the film.
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We reached out to Paramount Pictures who acknowledged the tests, but refute the claim that Johansson was involved:
A test was done related to a specific scene for a background actor which was ultimately discarded. Absolutely no visual effects tests were conducted on Scarletts character and we have no future plans to do so.
Our sources maintain Johanssons character was specifically the focus of these tests, though they were done without her participation or knowledge.
Source (Screencrush)