When we last checked in on Kamui Cosplay and her Horizon: Zero Dawn costume, she had finished the leg and shoe armor. She’s replicating Aloy’s Shadow Stalwart armor, which is the most complex in the game, and documenting each aspect of the build. Her most recent how-to video covers what she did to make Aloy’s wig and headpiece and also gives an overview of the make-up.
She also finished the belt and armor plates:
Keep up with the project at Kamui’s YouTube channel.