Hey, I’m really interested in this - Qt is my other recent addiction, along with Panda, so it’s my two current favorite things 
When panda creates its main window, is there a way to parent it to another window? I don’t even know what I’m talking about completely, I just gathered this from reading other peoples’ Ogre+QT code. that might be more efficient than rendering to a texture and then converting it to a qimage.
Wonder if you could also use the QGLPixelBuffer for this?