i'm creating a hairs and cothes but,whenever i try to creat a hair,it dissapear in the bodyshop,mine other creation don't do that,maybe it because some clothes and hair have too much poly? when i reduce the poly,it show up in game so...is there another way to fix t without ruining the mesh shape?
If they're so high poly the game/Bodyshop has issues with showing them, you probably should reduce the polycount. Few meshes need more than 15,000 polys to look good - and that's roughly in the area where the game can still show the mesh Without any issues. 20,000+ is boardering on that limit where you need to turn on shaders to make them show up (and not all computers/graphic cards do well with shaders).