ZBrushCentral

How to merge all subtools and don't lost the surface noise I created?

Hi there,
I have the 2019 version and I do have the subtool master in the zplugin menu, but I don’t know how to use it.
Everytime when I try to merge the subtools of my art, I lose the texture I had. I made my texture over some expecific subtools, using the surface / noise option. When I merge down or merge visible, with weld or uv or none selected or even when I try to use the subtool master merge … Always the same. I lose my noise texture.

How to do it properly?

Can anyone help me?

In the picture I’m showing an example of the part textured… I need only the vest and belts with texture…