# There are many holes in the primitive created by EllipseGeometry

**URL:** <https://community.cesium.com/t/there-are-many-holes-in-the-primitive-created-by-ellipsegeometry/8960>\
**Category:** CesiumJS\
**Created:** [December 19, 2019, 8:01am UTC](https://community.cesium.com/t/there-are-many-holes-in-the-primitive-created-by-ellipsegeometry/8960 "2019-12-19T08:01:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jingjie\_liu](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/jingjie_liu/32/2152_2.png) [@jingjie\_liu](https://community.cesium.com/u/jingjie_liu)\
**Post date:** [December 19, 2019, 8:01am UTC](https://community.cesium.com/t/there-are-many-holes-in-the-primitive-created-by-ellipsegeometry/8960/1 "2019-12-19T08:01:07Z")

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**1. A concise explanation of the problem you’re experiencing.**

i create a primitive by EllipseGeometry,and set viewer.scene.globe.depthTestAgainstTerrain=true; the primitive shows different way

 ![无标题.png](https://global.discourse-cdn.com/cesium/original/1X/7a27fb1e98d4b009237f266b8bbdcd533dd56b4c.png)

**the code is here [https://sandcastle.cesium.com/#c=lVZtb9owEP4rEftAmDKHsmpSKVSr6DpVWttJZfuEtJnkErz5JbIdCp347zsHQkkbAvWHKPbd89xzvrOTOdXenMEjaG/oSXj0RmBYLsjPYs1vR8V0pKSlTIJud84n0vM2EGIikEBSrqZAYsjsbAzGXqboauwYtMaXodU5FKA5huIgUzvDUKddHKS7ZtsO55IpwyxT8l5+4ZxlRrEY/TeyRlRbfKPyI0m0EleQagDjfzhxZAGyuudJ16l8wbwWHFEBmhID1iXo/6s6uRFjBkxSp6D/pqhn3W6nSrfq1KQnVAz8llrNFs9pjTWVJlFaGALU2Dul7exHNlbXbAHxtUbRfs221GSJAaAwQ7Wcawx8BSXA6mVd4lhKi13wlqQ7wWsaA4Ld0j9KXy6YQbZer/Df48hks+OqMccbbDMqI+hVky2zLM112aYbn37JFRxRu0wzgUWYw2kl3vdyuS5QGO6WvL87CfbLKqWb/qtca1A0y4BqZ+3v6sIooBnll1tznUA3xMazFr4P5EZCp5pFfa/BxQ27zFBaO8nNDG5E2g6a3XPJisNwkLfoW8WVrggfuZWiaUfGFJMH3G6Z+pPWu0+9iCbJpNUJDjMzQVMnm4QxtTRkIg0jpiMOJJMHc1gdsBuVa1ev381u0ZP4VVanmKRgt4XZNd7ILLdeZdZppj5mb3ejb1+GpZArSGjOn/VUo58f5p9D1POMRcYKlBh7BBhPVsIVtV7sCBJNI1vsSOLuy7tcTPE2C72PZ+6iOo6uUGLseyfLj22AzEdmcbpuwxvXMchhYWFzDb0rv+ihwBzFU+4BiVmCRwWJClKi0+lb0JRnM+qKVIDpEVANqFZuGQ4gVs3mhobedyZWdadxdfBruvsPsr2aDaFx7D/f1J3zVtAaGLvkcLHGf2Yiww+sl2vuExJaEBnHzE04zaO/YElkjAs1CEvQIGZzj8XDSevF39Ck5UWcGoOWJOf8gT3BpHUxCNG/AsMujfH+uZ+D5nTpXGYnF9/Wi4SQQYjT1yirFJ9SvcP4Hw](https://sandcastle.cesium.com/#c=lVZtb9owEP4rEftAmDKHsmpSKVSr6DpVWttJZfuEtJnkErz5JbIdCp347zsHQkkbAvWHKPbd89xzvrOTOdXenMEjaG/oSXj0RmBYLsjPYs1vR8V0pKSlTIJud84n0vM2EGIikEBSrqZAYsjsbAzGXqboauwYtMaXodU5FKA5huIgUzvDUKddHKS7ZtsO55IpwyxT8l5+4ZxlRrEY/TeyRlRbfKPyI0m0EleQagDjfzhxZAGyuudJ16l8wbwWHFEBmhID1iXo/6s6uRFjBkxSp6D/pqhn3W6nSrfq1KQnVAz8llrNFs9pjTWVJlFaGALU2Dul7exHNlbXbAHxtUbRfs221GSJAaAwQ7Wcawx8BSXA6mVd4lhKi13wlqQ7wWsaA4Ld0j9KXy6YQbZer/Df48hks+OqMccbbDMqI+hVky2zLM112aYbn37JFRxRu0wzgUWYw2kl3vdyuS5QGO6WvL87CfbLKqWb/qtca1A0y4BqZ+3v6sIooBnll1tznUA3xMazFr4P5EZCp5pFfa/BxQ27zFBaO8nNDG5E2g6a3XPJisNwkLfoW8WVrggfuZWiaUfGFJMH3G6Z+pPWu0+9iCbJpNUJDjMzQVMnm4QxtTRkIg0jpiMOJJMHc1gdsBuVa1ev381u0ZP4VVanmKRgt4XZNd7ILLdeZdZppj5mb3ejb1+GpZArSGjOn/VUo58f5p9D1POMRcYKlBh7BBhPVsIVtV7sCBJNI1vsSOLuy7tcTPE2C72PZ+6iOo6uUGLseyfLj22AzEdmcbpuwxvXMchhYWFzDb0rv+ihwBzFU+4BiVmCRwWJClKi0+lb0JRnM+qKVIDpEVANqFZuGQ4gVs3mhobedyZWdadxdfBruvsPsr2aDaFx7D/f1J3zVtAaGLvkcLHGf2Yiww+sl2vuExJaEBnHzE04zaO/YElkjAs1CEvQIGZzj8XDSevF39Ck5UWcGoOWJOf8gT3BpHUxCNG/AsMujfH+uZ+D5nTpXGYnF9/Wi4SQQYjT1yirFJ9SvcP4Hw)**

**3. Context. Why do you need to do this? We might know a better way to accomplish your goal.**

is there any way to solve this?

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<div class="post-metadata">

**Author:** ![omar](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/omar/32/1999_2.png) [@omar](https://community.cesium.com/u/omar)\
**Post date:** [December 19, 2019, 1:26pm UTC](https://community.cesium.com/t/there-are-many-holes-in-the-primitive-created-by-ellipsegeometry/8960/2 "2019-12-19T13:26:26Z")

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This is happening due to z-fighting. You can fix it by moving the primitive a little bit off the ground, or I think by using a ground primitive (you can test this by creating an entity that’s clamped to the ground, which uses a ground primitive under the hood).