> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Voronoi Volume Lattice
In addition to periodic lattices, you can create non-periodic (stochastic) lattices in nTop.
The **Voronoi Volume Lattice** block creates a lattice from the Voronoi diagram of a list of points within a volume.
You can include a surface mesh as an optional *Boundary* input, which will confine the lattice created inside the mesh and close the beams.
You can also use the **Trim Lattice** or the **Boolean Intersect** blocks to remove the lattice extending outside the part to keep open beams at the edges.
Note: The **Trim Lattice** option will maintain lattice properties in the output's details, while the **Boolean Intersect** option will output an implicit body with no lattice properties.
## Volume Voronoi Properties
Along with the standard properties within a lattice, the**Voronoi Volume Lattice**has two additional properties: *cell diameters* and *voronoi cells*.
The **cell diameters**property provides the porosity of each cell produced in the Voronoi lattice. While the Point spacing input in the Random Points in a Body controls the porosity, there is a range across the lattice due to how the Voronoi lattice is produced, as shown below.
The *voronoi cells* property is a list of the Voronoi cells produced in the lattice as shown below.
## Example Application
Below is an example Custom Block that uses the Voronoi lattice to add randomness to any lattice structure. See the example below with a simple cubic graph lattice. You can download this block in the [Follow Along: Non-Periodic Lattices](https://learn.ntop.com/lessons/follow-along-non-periodic-lattices/) text lesson in this section.
