Andras,
I am using the non-native widget. That’s the one that doesn’t work. If I use QVTKOpenGLNativeWidget, since it inherits from QOpenGLWidget, the QT calls to initialize OpenGL are made (initializeGL). But if I use QVTKOpenGLWidget, the Qt OpenGL initialization never seems to occur. I have been poking through the source code and I can’t figure out how it is supposed to happen. QVTKOpenGLWidget has a QVTKOPenGLWIndow* inside of it. This class has an initilalizeGL call but it is never called and there doesn’t seem to be any external way to call it.
thank you for any help.