# \#extended-materials

**URL:** https://discourse.threejs.org/tag/extended-materials/1325.md

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## [Extended Material Causing Change in Position](https://discourse.threejs.org/t/extended-material-causing-change-in-position/43489)

<div class="topic-metadata">

**Author:** [@phil\_crowther](https://discourse.threejs.org/u/phil_crowther)\
**Replies:** 28\
**Last updated:** [November 8, 2022, 12:12am UTC](https://discourse.threejs.org/t/extended-material-causing-change-in-position/43489 "2022-11-08T00:12:24Z")

</div>

I am attempting to create an extended material which will allow me to change the height of vertices in a plane. That part works, but thee is an unexpected side effect. It appears that the object center is somehow displa…