---
layout: stdlib-reference
---

# attribute [maxvertexcount]

## Description

Used on a geometry shader entry point to specify the maximum number of vertices that the geometry shader can output.

## Signature

<pre>
[<a href="maxvertexcount.html">maxvertexcount</a>(<a href="maxvertexcount.html#decl-count" class="code_param">count</a> : <span class="code_keyword">int</span>)]
</pre>

## Parameters

####  <a id="decl-count"></a>count  : int
The maximum number of vertices that the geometry shader can output.