I’ve run into an issue using Hierarchical PCG graphs and the difference node. It seems to mostly work, however where the edges of the grid are, if a mesh overlaps the next grid, the difference node fails.
You can see in this example that the large rock does not appear in the same chunk as the tree, and therefore the tree isn’t culled from the list of points.
Maybe I’m missing a setting somewhere, but it seems that the only workaround is to disable Partitioning, which fixes the issue, but isn’t ideal for performance.
Unreal Engine 5.7, PCG Graph is set to Hierarchical with unbounded grid size, and grid size overrides set within the graph. Both the trees and rocks share the same grid size