# rendering slows down

**URL:** https://discourse.vtk.org/t/rendering-slows-down/226
**Category:** Support
**Created:** [February 6, 2019, 4:40am UTC](https://discourse.vtk.org/t/rendering-slows-down/226 "2019-02-06T04:40:57Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![kondreti](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/k/aeb1de/32.png) [@kondreti](https://discourse.vtk.org/u/kondreti)
#### Post date: [February 6, 2019, 4:40am UTC](https://discourse.vtk.org/t/rendering-slows-down/226/1 "2019-02-06T04:40:57Z")

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Adding same actor multiple times on first time added point cloud is ok. After that I have attached another point cloud, but now rendering and all other operations slowed down (even i have removes all actors). Any suggestion?

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### Author: ![mta](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/m/a9adbd/32.png) [@mta](https://discourse.vtk.org/u/mta)
#### Post date: [November 5, 2019, 3:16pm UTC](https://discourse.vtk.org/t/rendering-slows-down/226/2 "2019-11-05T15:16:28Z")

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I experienced a similar issue when rendering a point cloud and adding more points to the cloud. I have not figured out how to solve it, but my initial thought would be using vtkPointGaussianMapper to visualize the point cloud.