# When I use NavModifierVolumes on the map, there is a drop in FPS 

**URL:** <https://forums.unrealengine.com/t/when-i-use-navmodifiervolumes-on-the-map-there-is-a-drop-in-fps/2681718>\
**Category:** AI\
**Tags:** unreal-engine, editor, Rendering, question\
**Created:** [December 3, 2025, 3:43pm UTC](https://forums.unrealengine.com/t/when-i-use-navmodifiervolumes-on-the-map-there-is-a-drop-in-fps/2681718 "2025-12-03T15:43:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![lom](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@lom](https://forums.unrealengine.com/u/lom)\
**Post date:** [December 3, 2025, 3:43pm UTC](https://forums.unrealengine.com/t/when-i-use-navmodifiervolumes-on-the-map-there-is-a-drop-in-fps/2681718/1 "2025-12-03T15:43:56Z")

</div>

I can’t figure out why the FPS drops when I add NavModifierVolumes to the map, but when I remove NavModifierVolumes, everything works fine.

 ![2025-12-03_111602](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/f/a/4fa8ce2252691e6a449ac23ba3d6ffabe9b75d00.jpeg)

 ![2025-12-03_111831](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/f/2/cf20a9b6b424db646455ddd6ceaa60888687b146.jpeg)

 ![2025-12-03_111646](https://d3kjluh73b9h9o.cloudfront.net/original/4X/f/1/b/f1b8bffc7a4e5a7b5c9f2ca4d053157efc2f674b.jpeg)