# Mesh Merging

It's ideal to merge zones from your maps into a single static mesh. Be mindful of the mesh diversity involved in merging to avoid an excessive number of drawcalls.

* Prefer smaller zone merges to allow for Cul, LOD, or HLOD replacements, for example, a maximum of 50m.
* Limit the number of slots per merge if possible
* In some cases it is preferable to use instanced mesh, (WARNING, use only HISM and not ISM, because only HISM allows the management of LODs).

Different tools allow you to save time.\ <br>

<figure><img src="/files/Sg7ZUksoMzzdmDWGQvKH" alt=""><figcaption></figcaption></figure>


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