Could someone please tell me how i could add custom costumes? I havent’t been able to find any tutorials or anything online besides 3make videos if somebody could help i would greatly appreciate it!

https://www.moddb.com/games/resident-evil-3/mods

I'm not entirely sure but I think this website might have some. I advise using caution, some costumes can alter hitboxes or other features of the game. This would lead to your run being rejected

Thank you!