You may not be able to get the muscle definition that giga chad has because he must have a body fat index below 1% and I currently have not been able to reproduce such a thing in the game, however I think you can make characters with a pretty close bulk to giga chad 🧐
Anyway I'm aware that there's a big difference between a body like giga chad's and the closest body you can get to make in cosmos, there's still a lot of work to do in character editing!
I keep in mind all the suggestions with cosmos mode, this should be a system for everyone ^^