<p>In blender, you can occasionally have faces with flipped normals. Those areas then are &quot;inside out&quot;. Such areas are just ignored in Cura. Fixing the files is as simple as recalculating the normals, but you'd best use a program like <a href="https://service.netfabb.com/login.php" rel="nofollow noreferrer">NetFabb</a> for for that.</p>

CC BY-SA 4.0
2020-12-16T16:41:30.120Z
2020-12-16T16:41:30.120Z
Trish
<p>I 3D modeled a cartoon car using Blender, mostly using add and subtract with boolean tools. When I export to Ultimaker Cura, I get these cuts along the model. Does anyone know why this is happening? Appreciate any feedback on the model.</p>
<p><a href="https://i.sstatic.net/y4Tvv.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/y4Tvv.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/DHH8o.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/DHH8o.png" alt="enter image description here" /></a></p>
<p>The blender file: <a href="https://github.com/dantedaiki/jQuery-File-Upload/blob/master/Cartoon%20Car.blend" rel="nofollow noreferrer">https://github.com/dantedaiki/jQuery-File-Upload/blob/master/Cartoon%20Car.blend</a></p>

CC BY-SA 4.0
2020-12-16T07:00:19.817Z
That is not uncommon for Blender created files, look into [these questions](https://3dprinting.stackexchange.com/questions/tagged/blender). It probablyhas something to do with the normals of the surfaces being inconsistent, an online STL fixing utility like [NetFabb](https://service.netfabb.com/login.php) may help.
0scar
<ultimaker-cura><3d-models><blender>
3D model with errors when exporting to Cura
Dante Daiki
# 3D model with errors when exporting to Cura

(Asked by: username_0 on 2020-12-16)

I 3D modeled a cartoon car using Blender, mostly using add and subtract with boolean tools. When I export to Ultimaker Cura, I get these cuts along the model. Does anyone know why this is happening? Appreciate any feedback on the model.

[![enter image description here](https://i.sstatic.net/y4Tvv.png)](https://i.sstatic.net/y4Tvv.png)

[![enter image description here](https://i.sstatic.net/DHH8o.png)](https://i.sstatic.net/DHH8o.png)

The blender file: <https://github.com/dantedaiki/jQuery-File-Upload/blob/master/Cartoon%20Car.blend>

**Tags:** ultimaker-cura, 3d-models, blender
> **Comments:**
> **username_1**: That is not uncommon for Blender created files, look into [these questions](https://3dprinting.stackexchange.com/questions/tagged/blender). It probablyhas something to do with the normals of the surfaces being inconsistent, an online STL fixing utility like [NetFabb](https://service.netfabb.com/login.php) may help.  

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## 1 answers

### Answer by username_2 on 2020-12-16. Score: 0 | Accepted answer

In blender, you can occasionally have faces with flipped normals. Those areas then are "inside out". Such areas are just ignored in Cura. Fixing the files is as simple as recalculating the normals, but you'd best use a program like [NetFabb](https://service.netfabb.com/login.php) for for that.


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