This happens if the computer you're playing on is not powerful enough to run TU Project, I'm not saying you have a bad computer, at the moment the game is very CPU intensive, I'm working on improving that aspect, but GPU wise there's nothing you can do at the moment unless Epic does some magic and updates the lighting in Unreal Engine 5 to make it run faster.
Sorry for the inconvenience :c
That's pretty weird, try deleting the game save files, they are located in "C:\Users\[your username]\AppData\Local\TU", maybe the character generation script is failing by generating too many objects, I don't know of such a bug because when I work in the game I work with save data and in my case I have no worse performance after generation, even using data from previous versions, but it could be a bug in some specific customisation parameter 🤔
If you don't mind, please let me know if deleting the save data restores the performance you had before, as I'd be very grateful to find a possible bug. And sorry again, I know that bad performance is something that can really ruin the experience 😞
