This has probably been said before, but I will ask again.
If you import an obj, adjust your material shaders, maybe even use a power fractal type material,.....
If you save this obj as a tgo, does it retain the materials?
Then say you want to change the material when it is now tgo, do you save it as a new tgo or just save again as same? will this update in any tgd using this object?
I understand the geometry won't change.