@sinanmut When I create the 3D objects in the initializeGL function, it is fine paintGL function renders these objects. Later on when I want to add new objects to the scene I don't see these new ones being rendered by painGL function. Is there any flag that I have to add in paintGL fuinction or in initializeGL function? Thanks,

Did you ever manage to solve this? I got the same issue :/ Solved, I had 2 context's somehow and that messed it all up on my end.