Aearon, Just as for the objects created in 3ds the object offset rotation is the same for all the imported objects I would like to re-instance Retur…

It’s something like that: it changes all the objects into instances in the exact “rotation state” of the “master_object”

I think that you point out the origin of my problem: the rotation of the objects in world space is what I thought being the “history” of the objects c…

Gibbz In fact it is much simplier… I import my objects, I want to edit them as editable polys so I convert them to editable polys… then I would like m…