# Modify an OSM .3dtiles file
**URL:** https://community.cesium.com/t/modify-an-osm-3dtiles-file/42552
**Category:** Cesium for Unity
**Created:** [August 6, 2025, 9:32am UTC](https://community.cesium.com/t/modify-an-osm-3dtiles-file/42552 "2025-08-06T09:32:21Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@mdjones0](https://community.cesium.com/u/mdjones0)
#### Post date: [August 6, 2025, 9:32am UTC](https://community.cesium.com/t/modify-an-osm-3dtiles-file/42552/1 "2025-08-06T09:32:21Z")
We have a self-hosted license which comes with an OSM buildings .3dtiles data file. We’d like to modify this file by removing some buildings, replacing them with custom content, and exporting back to a .3dtiles file so we can self-host the modified data for our application. Is there a way to do this and if so what tool is recommended?
Thanks
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### Author:  [@Aankit\_K](https://community.cesium.com/u/Aankit_K)
#### Post date: [August 6, 2025, 10:26am UTC](https://community.cesium.com/t/modify-an-osm-3dtiles-file/42552/2 "2025-08-06T10:26:07Z")
as far as I know you can’t modify .3dtiles file to remove some content and insert new one at its place. If you are using cesium for unity you can use cesium cartographic polygon to cut building area and insert your content there but this is not very scalable if you want to insert buildings at city scale.