Testing mesh without closing the game?

Hi, I would like to know if there is a way to test our cc in the game without having to restart it. I'm having difficulty with my normal/specular maps and I have to do several tests to see the result. But what takes the longest time is closing and reopening the game over and over again after each modification I made to it... Is there a way to do this faster? Thank you.


Edit: When I try to save my changes in sims4studio while the game is open, I get the following message: ''Unable to ave. Please make sure that your project file is not being used by another program.''