# 3D Tiles understanding

**URL:** https://community.cesium.com/t/3d-tiles-understanding/11483
**Category:** CesiumJS
**Created:** [November 7, 2020, 5:19pm UTC](https://community.cesium.com/t/3d-tiles-understanding/11483 "2020-11-07T17:19:39Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![11164](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/11164/32/3527_2.png) [@11164](https://community.cesium.com/u/11164)
#### Post date: [November 7, 2020, 5:19pm UTC](https://community.cesium.com/t/3d-tiles-understanding/11483/1 "2020-11-07T17:19:39Z")

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Hello everyone, I’m new to Cesium and I don’t clearly understand what happens to my .glb model when I choose “3D Model (Tile as 3D Tiles)”. Does it converts to .json format?

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### Author: ![dzung](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/dzung/32/2996_2.png) [@dzung](https://community.cesium.com/u/dzung)
#### Post date: [November 10, 2020, 2:43pm UTC](https://community.cesium.com/t/3d-tiles-understanding/11483/2 "2020-11-10T14:43:13Z")

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Welcome to the Cesium Community!

Check out our high level explanation of the tiler you are using for your .glb model: [BIM & CAD Tiler](https://cesium.com/3d-tiling-pipeline/bim/)! The out put format of 3D Tiles is .json. You can learn more about 3D Tiles from our [3D Tiles Overview](https://github.com/CesiumGS/3d-tiles/blob/master/3d-tiles-overview.pdf).