Issues with uv_1 and pants not sliding with sliders [SOLVED]

Hi. This issue is caused by the shape of the mesh.
See the blue line in the middle of the scene? The right side of shorts must not cross it.

you need to isolate it and move this area with proportional editing


Before re-transferring any data, separate the body from the garment. The body's data must not be overwritten. It was and now uv_1 is torn, which can result in gaps in-game.
- delete legs so that only the garment remains;
- clone some skintight underwear, export the blend, append it;
- transfer uv_1 from a meshgroup that contains the covered area;
- select that meshgroup, remove doubles, delete all areas that are covered;
- remove doubles on other meshgroups


Also, for the future, pay attention to the polycount. There is no reason for your item to be 3 times more high poly than maxis's most complex ones. If you plan on sharing your content with others, you need to be considerate of the strain it puts on the game, otherwise people will stop downloading from you