David Harewood’s reveal that the Supergirl team deliberately leaves out the CG when it comes especially emotional scenes explains why Martian Manhunter is usually in human form in big moments.
Martian Manhunter has one of the most tragic backstories of any Supergirl character to date, and we’ve seen his heartbreak firsthand through the use of flashbacks to his days on Mars.
It may be difficult for Harewood to play a CG character, but I’d say that he pulls off both versions of the character quite well.
Supergirl has done a truly remarkable job in showing that heartbreak via CG, but a lot of Martian Manhunter’s most emotional scenes have happened when he’s in the guise of Hank Henshaw.