Hey, thanks for the reply. I am still confused .
Say I build the kd-tree from scratch. I have N entities each with their own AABB bound. Would I construct the kd-tree using the position of the entities? Or should each point of the bounding boxes be used? To me, a BVH makes much more sense for frustum culling as the nodes represent an AABB. Same goes for structures like octrees for example. Each node represents an "area" in space. With a kd-tree a node represents a split in one dimension.