I finish my tutorial :
So after you can open it into Sketchup, you will have perhaps some things to do like re-textured some very little parts of your object or character, little details then...
To use this into well textured 3ds, you need to have the pro version of shetchup which permit to export into 3D Studio (.3ds). This last registering into 3ds permit to have a well textured object.
So for resume, for having well textured object you have to pass by several steps :
DAZ Studio --> .obj
Accutrans --> to register first time into 3ds
SU --> to register second time into 3ds
= well textured object 3ds !!!
That's i use and it works very well !!!
But may notice that the characters are often heavy in sizes into 3ds and obj. DAZ studio sell a little plugin with DAZ called DECIMATOR, you can easily use it in order to put off or hide some polygons.