# Model Distortion

**URL:** <https://community.pix4d.com/t/model-distortion/15986>\
**Category:** PIX4Dmapper\
**Created:** [December 23, 2020, 9:26pm UTC](https://community.pix4d.com/t/model-distortion/15986 "2020-12-23T21:26:41Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Yuka](https://avatars.discourse-cdn.com/v4/letter/y/9d8465/32.png) [@Yuka](https://community.pix4d.com/u/Yuka)\
**Post date:** [January 5, 2021, 9:09am UTC](https://community.pix4d.com/t/model-distortion/15986/4 "2021-01-05T09:09:56Z")

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Hello Kevin,

Thank you for uploading the quality report.

We found bugs on version 4.6.3 of Pix4Dmapper regarding the horizontal and vertical accuracy. Apologize for any inconvenience caused.

If it is possible, would you please process it using version 4.5.6 with the 3D Maps template and mark the GCPs to achieve the best accuracy? You can download 4.5.6 from [here](https://cloud.pix4d.com/download/) and find information [here](https://support.pix4d.com/hc/en-us/articles/202557299-Software-Download-and-Installation) about Software Download and Installation.

For more information about the bugs, please visit  
[The horizontal and vertical accuracy values are not being read correctly](https://community.pix4d.com/t/horizontal-and-vertical-accuracy-not-being-read-correctly/16049)  
[Vertical offset for projects in feet](https://community.pix4d.com/t/vertical-offset-in-pix4dmapper-4-6-3-projects-in-feet/15978).

Thank you for your understanding.

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