The second of two pictures I got from: https://www.deviantart.com/kingkevzilla
Sometime ago I read that an earlier version of the first Planet of the Apes film's script involved a scene with evolved baboons, in the cornfield scene. I've been fascinated by that for awhile so I got KingKevZilla to draw what one of those baboons could have looked like, considering the limitations of makeup at the time. This second image (which was actually done first) is what they would've dressed like in "Conquest for the Planet of the Apes".