What format could I write, and recall picked kdtree?
I was thinking of a large dynamic open world, where objects whos kdtree is outside a range, get collapsed to a file and delete all the game objects,
next time you near the area, the kdtree is opened and the objects are added to the scene over time,
terrain = all the same instance of planes using vertex splat mapling and being deformed by a height map table.
The important part here, how do I save a kdtree ?