# ATLAS - BUILDER producing inverted template meshes?

**URL:** <https://discourse.slicer.org/t/atlas-builder-producing-inverted-template-meshes/46747>\
**Category:** Support\
**Created:** [April 15, 2026, 2:36pm UTC](https://discourse.slicer.org/t/atlas-builder-producing-inverted-template-meshes/46747 "2026-04-15T14:36:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![raranda22](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/raranda22/32/80343_2.png) [@raranda22](https://discourse.slicer.org/u/raranda22)\
**Post date:** [April 15, 2026, 2:36pm UTC](https://discourse.slicer.org/t/atlas-builder-producing-inverted-template-meshes/46747/1 "2026-04-15T14:36:04Z")

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Hello,

I’ve been attempting to make a template mesh via the BUILDER module of ATLAS. I’ve made several of these with different datasets, but this time it appears the template mesh produced is “inverted”. As you can see, the surface should be bright yellow, but instead its this orangish/brownish color. Usually, these meshes have a default surface yellow color with the orange in the interior surface.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/e/0e1b4486087f7cd34504d44e155c97e399e5b59c.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/e/8e612146b7dcd6cd81834e437ca7d9b35cbea510.jpeg)

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [April 15, 2026, 3:18pm UTC](https://discourse.slicer.org/t/atlas-builder-producing-inverted-template-meshes/46747/2 "2026-04-15T15:18:47Z")

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This is usually an easy fix surface toolbox, just check flip surface normals option, and then output to a new model. Not sure why they came up in the wrong direction in the first place.

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**Author:** ![raranda22](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/raranda22/32/80343_2.png) [@raranda22](https://discourse.slicer.org/u/raranda22)\
**Post date:** [April 15, 2026, 3:59pm UTC](https://discourse.slicer.org/t/atlas-builder-producing-inverted-template-meshes/46747/3 "2026-04-15T15:59:12Z")

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Murat,

Thank you! I didn’t realize how easy that was in Surface Toolbox.

Best,

Ricardo