# Assigning material to a geometry

**URL:** <https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219>\
**Category:** FLAC3D\
**Created:** [February 8, 2022, 6:17am UTC](https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219 "2022-02-08T06:17:10Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Sureka](https://avatars.discourse-cdn.com/v4/letter/s/e9c0ed/32.png) [@Sureka](https://forum.itascainternational.com/u/Sureka)\
**Post date:** [February 8, 2022, 6:17am UTC](https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219/1 "2022-02-08T06:17:10Z")

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Can a material be assigned to a geometry created in extrusion pane?

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**Author:** ![cheng](https://avatars.discourse-cdn.com/v4/letter/c/ecccb3/32.png) [@cheng](https://forum.itascainternational.com/u/cheng)\
**Post date:** [February 8, 2022, 3:14pm UTC](https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219/2 "2022-02-08T15:14:38Z")

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You can assign groups to the blocks/zones created in extrusion pane. You can then easily assign a material in the datafile with a group range.

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**Author:** ![Sureka](https://avatars.discourse-cdn.com/v4/letter/s/e9c0ed/32.png) [@Sureka](https://forum.itascainternational.com/u/Sureka)\
**Post date:** [February 10, 2022, 7:26am UTC](https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219/3 "2022-02-10T07:26:52Z")

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Thank you for your response.

I have been trying to create a geocell layer in extrusion pane and assign geogrid structural element to it. But I’m unable to do it.

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**Author:** ![ddegagne](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/ddegagne/32/55_2.png) [@ddegagne](https://forum.itascainternational.com/u/ddegagne)\
**Post date:** [February 10, 2022, 5:16pm UTC](https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219/4 "2022-02-10T17:16:02Z")

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> [@Sureka](#):
>
> geocell layer

You may find this paper from the [2020 Itasca Symposium](https://www.itascainternational.com/events/applied-numerical-modeling-in-geomechanics-2020) of some interest. Paper: [https://bit.ly/3swLGlV](https://bit.ly/3swLGlV). Presentation: [https://bit.ly/3HOTIx6](https://bit.ly/3HOTIx6).

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**Author:** ![Sureka](https://avatars.discourse-cdn.com/v4/letter/s/e9c0ed/32.png) [@Sureka](https://forum.itascainternational.com/u/Sureka)\
**Post date:** [February 11, 2022, 4:56am UTC](https://forum.itascainternational.com/t/assigning-material-to-a-geometry/219/5 "2022-02-11T04:56:58Z")

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Thank you for your input. I’ll try implementing it.