physicsAsset get horrible after bone transform

youtube here

I want to bone transform my skeletal mesh, so i can get 1:1 same scaled physics and mesh size,
So i tryed. i decrease root bone size, physicsAsset body also decrease as i expect, but its not decreased anymore from some values, same as increase. as like utube, its not resize, its just…look horrible.

i want to know why is this happening and how to i manage it?

oh yeah, cloth also looks horrible too, but this is next probloms :smiley: first, i need to manage my physicsAsset perfectly…

Please help. Thanks.