# Bounding box bigger than concave object (ExtrudeGeometry)

**URL:** <https://discourse.threejs.org/t/bounding-box-bigger-than-concave-object-extrudegeometry/26073>\
**Category:** Questions\
**Tags:** bounding-box, shapes, geometry\
**Created:** [May 8, 2021, 4:32pm UTC](https://discourse.threejs.org/t/bounding-box-bigger-than-concave-object-extrudegeometry/26073 "2021-05-08T16:32:22Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![s0a](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/s0a/32/11769_2.png) [@s0a](https://discourse.threejs.org/u/s0a)\
**Post date:** [January 2, 2022, 12:49am UTC](https://discourse.threejs.org/t/bounding-box-bigger-than-concave-object-extrudegeometry/26073/4 "2022-01-02T00:49:50Z")

</div>

I patched my source to use this workaround and:

- it does _ **fix** _ bounding box computation
- but it also _ **breaks** _ ray intersections

---

_[View the full topic](https://discourse.threejs.org/t/bounding-box-bigger-than-concave-object-extrudegeometry/26073)._