About this image

In the promotional video, the clothes of the Rooks are all black, instead of ugly green and yellow, and the clothes of the Thugs are all tattered light red or Dark brown, instead of the bright red in the game.I know that the thugs models are in 1_-_ACVI_London.data under DataPC_ACVI_London.forge, but I don't know how to edit them.Can anyone modify it?
(My English is not good, so I can only use translation software. Please forgive me.)