Knowing who the actors were as you were designing them helped, with Catherine's beauty and Renee's frailty, they directed me visually just by who they were.
I'd seen the current stage production and the 1975 production of Chicago. I liked them both very much, but I didn't use them necessarily as inspiration.
Each simian had a much different body suit, so besides trying to define class across species, there was a definite attempt to dress each group in different styles.
As a designer, you have to solve a lot of problems. Even though people are wearing clothes that are supposed to look beautiful, they'll have to do all kinds of things.
On Planet of the Apes, I had a very knowledgeable team who knew good materials, but I had one main source person who worked online and on the street continually looking for the proper materials.
Planet of the Apes was a gigantic challenge, making the clothes work so people could do stunts and action in the clothes. I really learned a lot about that in that movie.