<p>Try disabling the &quot;Union Overlapping Volumes&quot; option on Mesh Fixes section. Worked for me.</p>

CC BY-SA 4.0
2021-02-18T04:24:32.667Z
2021-02-18T04:24:32.667Z
Wolfgang Ponce
<p>I would recommend using an actual CAD/CAM program, such as Autodesk Fusion 360, instead of using a 3d model program. Not only will this be able to directly export you finished model to Cura, and the models are made in a way that works with a 3d printing slicer, there will be more help around 3D printing for it.</p>

<p>Although it is slightly difficult to use to start with, as you become more proficient, it is a very powerful tool to have. . Fusion 360 is free for hobbyists or students. See this link for help activating: <a href="https://www.autodesk.com/campaigns/fusion-360-for-hobbyists" rel="nofollow noreferrer">https://www.autodesk.com/campaigns/fusion-360-for-hobbyists</a>.</p>

<p>Another option would be SolidWorks, although you do have to pay for this option, but it is much simpler to work with in my opinion.</p>

CC BY-SA 4.0
2020-05-20T20:01:14.073Z
SolidWorks is so extremely expensive -- $4000+ USD -- that "you have to pay" does not really describe it.
ikrase
CC BY-SA 4.0
2020-05-21T06:51:26.887Z
Other free option that are easier to use for beginners: Design Spark Mechanical. Not as powerful though.
Trish
CC BY-SA 4.0
2020-05-21T14:17:50.957Z
@Trish Thanks for suggesting that. I will edit my post and add it.
LukeDunkley
CC BY-SA 4.0
2020-05-21T18:00:05.740Z
I've never had problems with models from FreeCAD, OpenSCAD, or QCAD, either.
Davo
CC BY-SA 4.0
2020-05-22T14:39:17.340Z
@Davo I'll edit my answer later to include these suggestions. I first need to try them though just to make sure there are no problems, or if there is anything confusing about it. Thanks.
LukeDunkley
CC BY-SA 4.0
2020-05-20T17:25:17.767Z
2020-05-20T17:51:37.740Z
2020-05-20T17:51:37.740Z
LukeDunkley
<p>I am Attempting to print this, from Blender
<a href="https://i.sstatic.net/kKdun.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/kKdun.jpg" alt="enter image description here"></a>
But Cura decides to fill in the middle part of the model. 
<a href="https://i.sstatic.net/1fj3T.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/1fj3T.png" alt="enter image description here"></a>
I exported and imported the model from an STL file.</p>

<p>If anyone can answer this, that would be greatly appreciated.</p>

CC BY-SA 4.0
2020-02-21T04:08:14.770Z
Likely the STL file is not actually valid (doesn't make up a manifold). I'm not sure if getting bad STL files like that is a common issue that can happen with Blender; it happens with various low-quality tools.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2020-02-21T08:18:09.747Z
:D there are faces inside the infill area.
Fernando Baltazar
CC BY-SA 4.0
2020-02-21T19:35:59.657Z
Have you tried to heal your model in Meshlab, then save and import into Cura?
Davo
CC BY-SA 4.0
2020-02-22T02:28:58.927Z
Nope, I've never tried Meshlab, never even heard of it until now.
Artimeises
<ultimaker-cura><anycubic-i3-mega><blender>
Cura Filling holes from a model from Blender
Artimeises
# Cura Filling holes from a model from Blender

(Asked by: username_0 on 2020-02-21)

I am Attempting to print this, from Blender
[![enter image description here](https://i.sstatic.net/kKdun.jpg)](https://i.sstatic.net/kKdun.jpg)
But Cura decides to fill in the middle part of the model.
[![enter image description here](https://i.sstatic.net/1fj3T.png)](https://i.sstatic.net/1fj3T.png)
I exported and imported the model from an STL file.

If anyone can answer this, that would be greatly appreciated.

**Tags:** ultimaker-cura, anycubic-i3-mega, blender
> **Comments:**
> **username_1**: Likely the STL file is not actually valid (doesn't make up a manifold). I'm not sure if getting bad STL files like that is a common issue that can happen with Blender; it happens with various low-quality tools.  
> **username_2**: :D there are faces inside the infill area.  
> **username_3**: Have you tried to heal your model in Meshlab, then save and import into Cura?  
> **username_0**: Nope, I've never tried Meshlab, never even heard of it until now.  

---

## 2 answers

### Answer by username_4 on 2021-02-18. Score: 2

Try disabling the "Union Overlapping Volumes" option on Mesh Fixes section. Worked for me.


---

### Answer by username_5 on 2020-05-20. Score: 1

I would recommend using an actual CAD/CAM program, such as Autodesk Fusion 360, instead of using a 3d model program. Not only will this be able to directly export you finished model to Cura, and the models are made in a way that works with a 3d printing slicer, there will be more help around 3D printing for it.

Although it is slightly difficult to use to start with, as you become more proficient, it is a very powerful tool to have. . Fusion 360 is free for hobbyists or students. See this link for help activating: <https://www.autodesk.com/campaigns/fusion-360-for-hobbyists>.

Another option would be SolidWorks, although you do have to pay for this option, but it is much simpler to work with in my opinion.

> **Comments:**
> **username_6**: SolidWorks is so extremely expensive -- $4000+ USD -- that "you have to pay" does not really describe it.  
> **username_7**: Other free option that are easier to use for beginners: Design Spark Mechanical. Not as powerful though.  
> **username_5**: @Trish Thanks for suggesting that. I will edit my post and add it.  
> **username_3**: I've never had problems with models from FreeCAD, OpenSCAD, or QCAD, either.  
> **username_5**: @Davo I'll edit my answer later to include these suggestions. I first need to try them though just to make sure there are no problems, or if there is anything confusing about it. Thanks.  

---

