I have done the UVs for each part of this model and normalized them individually: Then I selected all those parts and applied another unwrap modifier to make the atlas for all the model. Now I wanna normalize all the piles so every part of the model has the same proportions and then scale down or up all the UVs to fit them…
After trying with the normalize script inside of textools (which doesn't work with multiple objects) and relaxing all the UVs, I used the normalize tool of the Polyunwrapper demo after reseting Xform for all the objects (http://www.polytools3d.com/polyunwrapper/). I would have prefered something within 3ds Max, but that…
I don't have any transforms frozen, but I'm not sure what do you mean by scaling factor. I did reset Xform for every object without results, dunno if that's what you mean. Yup, it's 3ds Max. I did that with all the objects selected but it didn't work.