This created a voxeltreenode with its center in the middle, thus all direct subnodes should have the same distance to position of the voxelcluster. However, you removed "d->setCenterInGrid(glm::vec3(6, 6, 6));" which is why the center is in the llf-corner now, not in the middle of the cluster. I've no idea how to set the centerInGrid with the new worldtransform. Could you please fix this?