Thank you for your reply Robert!
I will try what you suggested to me about the displaying of the nodes.
And about the callbacks, well, yes i am using a huge amount of callbacks...
As a matter of fact, i would like to create a software like Celestia and the
nodes in the octree are groups of stars. And what i would like to do, is to
hide a group of stars when that group is far away from the viewer. So with
about 80000 stars in the scene, i assigned about 200 callbacks for each node of
the tree...
Bye
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