# Point Cloud error - black hole

**URL:** <https://community.pix4d.com/t/point-cloud-error-black-hole/9963>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [November 24, 2019, 1:17pm UTC](https://community.pix4d.com/t/point-cloud-error-black-hole/9963 "2019-11-24T13:17:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Phil](https://avatars.discourse-cdn.com/v4/letter/p/e95f7d/32.png) [@Phil](https://community.pix4d.com/u/Phil)\
**Post date:** [November 24, 2019, 1:17pm UTC](https://community.pix4d.com/t/point-cloud-error-black-hole/9963/1 "2019-11-24T13:17:38Z")

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Hi!

First time this happened in a project.

Initial processing seems to work great.  
 ![grafik](https://global.discourse-cdn.com/pix4d/original/1X/f79109453bc733ba03b65ec73ab2bb53448fb853.jpeg)

Quality Report seems fine too:  
 ![grafik](https://global.discourse-cdn.com/pix4d/original/1X/95694b6f0d183b874616b7340bc0935a80fd5b21.jpeg)

![grafik](https://global.discourse-cdn.com/pix4d/original/1X/4aa298ddbbb6b0ec465c5b0cb0d47130490b71fa.jpeg)

BUT big black hole in the Densified Point Cloud and therefore of course a blurry Ortho und DSM with hole.  
 ![grafik](https://global.discourse-cdn.com/pix4d/original/1X/82b37919bbac2bb61caf9c568b20a70bcf96a093.jpeg)

![grafik](https://global.discourse-cdn.com/pix4d/original/1X/fa96a4a57cbcf947780fd2a4b9ac55c45c504038.png)

> **Summary**
>
> FILES  
> [Report\_Phil.pdf](https://community.pix4d.com/uploads/short-url/va5uAwxoyXtCbgG1eJVQ0tNtd4z.pdf) (2.0 MB)
> 
> [Logfile\_Phil.zip](https://community.pix4d.com/uploads/short-url/bid8MeVCuj9EBvlRYDn4epNFwBz.zip) (537.9 KB)

Best Regards,  
Phil

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<div class="post-metadata">

**Author:** ![Pix4D\_Alumni\_MV](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/pix4d_alumni_mv/32/2071_2.png) [@Pix4D\_Alumni\_MV](https://community.pix4d.com/u/Pix4D_Alumni_MV)\
**Post date:** [November 25, 2019, 2:13pm UTC](https://community.pix4d.com/t/point-cloud-error-black-hole/9963/2 "2019-11-25T14:13:38Z")

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Hi @Phil,

Thanks for your quality report.

My best guess is that your point cloud show these holes because there is lack of matching:

 ![image](https://global.discourse-cdn.com/pix4d/original/1X/d90bd9dbc015a1408f63f16ffa1ad5f6c04bc318.png)

As you can see it here in many areas there are not connections/matching between the different cameras which results in many blocks (6 in your case).

I would try with these processing options:

**Step1**  
_Image scale on 1/2_  
_Rematch “ **Yes** ”_

**Step2**  
_Minimum number of matches on **2** _

This should already improve your point cloud.  
Let me know if it worked.  
Best