Three JS skeleton and gravity need help

Hi guys, I have a question. Is it possible to manipulate the skeleton while having gravity? Btw im creating a 3d human model, and I want to add a shirt with gravity.

Here is the example picture:

Short answer: No.

Long answer: this is usually accomplished by an artist, using a tool like blender. Search “blender clothing” on youtube.

Longer answer… of course it is theoretically possible, but you would end up re-implementing crappy version of the tools that 3d modelling software has been developing and refining for longer than you’ve lived on this earth.