> ## 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.

# How do I use the Mirror FE Mesh block?

## Question:

I want to speed up the meshing process by mirroring an FE Mesh. How can I do this?

## Applies to:

* Simulation
* Topology Optimization

## Answer:

This block mirrors an existing FE Mesh to cut down processing time for parts that are symmetrical.

To use the Mirror FE Mesh block:

**1.** Cut your part in half.

* * Use the **Boolean Subtract** block with your part and a Plane for the parting line. This cuts your part at the Plane.

![An image depicting how to use a Plane to cut a box in half using the Boolean Subtract block.](https://files.learn.ntop.com/help-articles/structures/1500002292442.png)

**2.** Create an FE Volume Mesh of the half part (this takes less processing time as compared to the full part).

**3.** Add a Mirror FE Mesh block.

* * Insert the **FE Volume Mesh**
    * Add a Plane at the parting line (use the plane that was used to cut your part).
    * Select Merge.

![A gif showing how inserting an FE Volume Mesh into the Mirror FE Mesh block results in a perfectly mirrored mesh.](https://files.learn.ntop.com/help-articles/structures/360103340153.png)

## Download the Example File:

* [Example File](https://files.learn.ntop.com/Support%20Article%20Example%20Files/Knowledge%20Base/Simulation/Mirror%20FE%20Mesh%20Example.ntop)

## Keywords:

*mesh boolean subtract block meshing cut fe question process plane time speed mirrored mirror*