# Point Cloud trimming with Breps & Meshes

**URL:** <https://discourse.mcneel.com/t/point-cloud-trimming-with-breps-meshes/22571>\
**Category:** Rhino for Windows\
**Created:** [July 13, 2015, 2:39pm UTC](https://discourse.mcneel.com/t/point-cloud-trimming-with-breps-meshes/22571 "2015-07-13T14:39:06Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![clement](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/clement/32/759176_2.png) [@clement](https://discourse.mcneel.com/u/clement)\
**Post date:** [July 13, 2015, 10:18pm UTC](https://discourse.mcneel.com/t/point-cloud-trimming-with-breps-meshes/22571/6 "2015-07-13T22:18:13Z")

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> [@JKolodner](#):
>
> hopefully I’m not buoyed by a false confidence that you made it look too easy!

Well, i´ve just had a simpler version using the available method to remove points from the pointcloud :

```
Rhino.Geometry.PointCloud.RemoveAt(index)

```

but somehow this was running in snailspeed. So i´ve decided to create a new pointcloud and replace the old one which seemed to be much faster. After i´ve seen this is not really fast with large clouds i´ve added multiprocessing. It might be simpler to understand without it 😉

btw. fighting the noise in your cloud might be better done in CloudCompare by smoothing using MLS.

- 

c.

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