At the end I've researched again the view's transformations and concluded to support both features and warn for the complexity. I did not re-implement the add/remove items of the scene together with a group. Thanks for the hint @Asperamanca .

@michelmadeira said in How to rotate a Pixmap around bottom, right corner?: How to change anchor point of a pixmap rotation? By modifying your QTransform to set 0/0 to the bottom right corner because the Qt coordinate system starts with 0/0 in the upper left.