# cesium 3dtiles with terrain overlay **URL:** \ **Category:** CesiumJS\ **Created:** [May 18, 2017, 2:33am UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531 "2017-05-18T02:33:45Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![xuncanzhe](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/xuncanzhe/32/3094_2.png) [@xuncanzhe](https://community.cesium.com/u/xuncanzhe)\ **Post date:** [May 18, 2017, 2:33am UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/1 "2017-05-18T02:33:45Z")
Dear all I generate a 3dtiles data into cesium for display, it is normal. But when I overlay stk terrain looks a bit strange. The following screenshot results are waiting all data is loaded. It looks like there is a horizontal tiles in the middle of the data that is not loaded. [![](https://lh3.googleusercontent.com/-3nABiohZIcs/WR0CgVOeAhI/AAAAAAAAABo/zmrJuwd6UQ4zi-mIikkusk98c9uUWbqNwCLcB/s1600/001.bmp)](https://lh3.googleusercontent.com/-3nABiohZIcs/WR0CgVOeAhI/AAAAAAAAABo/zmrJuwd6UQ4zi-mIikkusk98c9uUWbqNwCLcB/s1600/001.bmp) [![](https://lh3.googleusercontent.com/-msHkeo7_JiU/WR0ChK9g8AI/AAAAAAAAABs/uZgv_2JZc3E3gcbHnje1LvcjXZ-oei1dgCLcB/s1600/22.bmp)](https://lh3.googleusercontent.com/-msHkeo7_JiU/WR0ChK9g8AI/AAAAAAAAABs/uZgv_2JZc3E3gcbHnje1LvcjXZ-oei1dgCLcB/s1600/22.bmp) Bentley ContextCapture has the same situation, but it is very light and hard to find. I think this is related to 3dtiles source data. But I’m not sure if this is related to all types of tiles data dispatch? How can i solve this problem? [![](https://lh3.googleusercontent.com/-tb8lYRrGe_4/WR0G16Xgk-I/AAAAAAAAAB4/--NoiCLb6oYPPG6XGBuO1YFip8ZIsEqdgCLcB/s1600/44.bmp)](https://lh3.googleusercontent.com/-tb8lYRrGe_4/WR0G16Xgk-I/AAAAAAAAAB4/--NoiCLb6oYPPG6XGBuO1YFip8ZIsEqdgCLcB/s1600/44.bmp) ---
**Author:** ![sean\_lilley](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sean_lilley/32/2083_2.png) [@sean\_lilley](https://community.cesium.com/u/sean_lilley)\ **Post date:** [May 18, 2017, 11:36pm UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/2 "2017-05-18T23:36:14Z")
So this only happens when the STK Terrain is enabled? Is the hidden part under the terrain? If it helps you can reply to me directly with a link to a tileset and I can look into it. ---
**Author:** ![xuncanzhe](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/xuncanzhe/32/3094_2.png) [@xuncanzhe](https://community.cesium.com/u/xuncanzhe)\ **Post date:** [May 19, 2017, 7:33am UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/3 "2017-05-19T07:33:22Z")
[![](https://lh3.googleusercontent.com/-x3YdZEJObmY/WR6fTBd5MXI/AAAAAAAAACI/YhIwELBPLeoo34FUiKaixsz8FHs4r0YawCLcB/s1600/111.bmp)](https://lh3.googleusercontent.com/-x3YdZEJObmY/WR6fTBd5MXI/AAAAAAAAACI/YhIwELBPLeoo34FUiKaixsz8FHs4r0YawCLcB/s1600/111.bmp) Yes, is only STK Terrain, WGS84 Ellipsoid is normal. Looks like not under the terrain, Because the missing data is a regular line. Bentley ContextCapture public data has the same situation: [Bently public data](https://d3h9zulrmcj1j6.cloudfront.net/Marseille_Cesium/root.json) . Need to view the camera as far as possible horizontal, back and forth to move the terrain will appear a strange line. My own data to zoom in on this effect. 在 2017年5月19日星期五 UTC+8上午7:36:15，Sean Lilley写道： ---
**Author:** ![xuncanzhe](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/xuncanzhe/32/3094_2.png) [@xuncanzhe](https://community.cesium.com/u/xuncanzhe)\ **Post date:** [May 19, 2017, 9:18am UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/4 "2017-05-19T09:18:25Z")
My 3d-tiles: [marseille](https://adsgeo-my.sharepoint.com/personal/wang_fucong_astrium-geo_asia/_layouts/15/guestaccess.aspx?docid=1b40dee23189447c2af10d2955aa4dfac&authkey=AeNI2TwLDyaLjHV6IuSZxOc) 在 2017年5月19日星期五 UTC+8上午7:36:15，Sean Lilley写道： ---
**Author:** ![sean\_lilley](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sean_lilley/32/2083_2.png) [@sean\_lilley](https://community.cesium.com/u/sean_lilley)\ **Post date:** [May 19, 2017, 11:46pm UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/5 "2017-05-19T23:46:15Z")
Downloading now… Does it seem like it’s related to this: [https://github.com/AnalyticalGraphicsInc/cesium/issues/4381](https://github.com/AnalyticalGraphicsInc/cesium/issues/4381) ? ---
**Author:** ![xuncanzhe](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/xuncanzhe/32/3094_2.png) [@xuncanzhe](https://community.cesium.com/u/xuncanzhe)\ **Post date:** [May 22, 2017, 2:53am UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/6 "2017-05-22T02:53:04Z")
Yes, Looks like the same situation. I did the same in the latest version 1.33 test. 在 2017年5月20日星期六 UTC+8上午7:46:15，Sean Lilley写道： ---
**Author:** ![Faizal\_Avr](https://avatars.discourse-cdn.com/v4/letter/f/cdc98d/32.png) [@Faizal\_Avr](https://community.cesium.com/u/Faizal_Avr)\ **Post date:** [September 7, 2017, 3:40pm UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/7 "2017-09-07T15:40:43Z")
Hi, i have an issue for WGS84. when i move my 3D tiles object, it also moving. So it is not stay still on the position. i think thats because my 3Dtiles is not WGS84. do you know how can i solve this problem? ---
**Author:** ![Gabby\_Getz](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/gabby_getz/32/7838_2.png) [@Gabby\_Getz](https://community.cesium.com/u/Gabby_Getz)\ **Post date:** [April 12, 2018, 9:11pm UTC](https://community.cesium.com/t/cesium-3dtiles-with-terrain-overlay/5531/8 "2018-04-12T21:11:05Z")
Hi there, issue [#4381](https://github.com/AnalyticalGraphicsInc/cesium/issues/4381) has just been closed and may resolve your problem. Look for the change in the next stable release of Cesium on May 1st, or get it now in the master branch on GitHub [https://github.com/AnalyticalGraphicsInc/cesium](https://github.com/AnalyticalGraphicsInc/cesium).