ok, that’s a good way to rotate it, however it would be HALF_PI O.o. Anyway, this isn’t what I’m looking for as is the first thing I tried, then, I tried to translate it it to match the screen but… even if I succeeded with this, the width-height of the cam would continue altered. Maybe isn’t the right question to “rotate” the guiNode but the viewport somehow?, or the cam dimensions?.
I could handle the guiNode if rotating and translating it (I suppose) but then, what happens with lemur components, for example?, will they be aware of this when layouting?. Well… I think I didn’t try it enough.