The `* 1.732` was there to account for a block diagonally `d` nodes away, making the distance `sqrt(3) * d`. The `+ 2.6` quite obviously won't be able to cover this.    Here's a (terrible) drawing illustrating the problem in the 2D space:  ![unbenannt](https://user-images.githubusercontent.com/1042418/50724048-270a7f80-10e7-11e9-9489-cfcd00edb7a0.png)  