<p>The model clearly contains an enclosed surface, which is directed to the inside - in other words, it was modeled to contain a volume of air.</p>
<p>Those surfaces need to be removed to print the body solid. To do this, you could check if those surfaces constitute a separate shell for meshmixer. If yes, you can just go, run separate shells, remove those internal items, and then re-merge all other shells. Slicing that should result in the voids being filled.</p>
<p>If however the shell is meant to exist, then it should instead simply get its normals inverted. This is best done with modeling software such as blender. Some steps you need can be seen <a href="https://3dprinting.stackexchange.com/a/15881/8884">here</a></p>

CC BY-SA 4.0
2022-06-22T10:35:25.023Z
2022-06-22T10:35:25.023Z
Trish
<p>This is a problem with the model, you need to make sure that the model isn't hollow. You might be able to get around this though if you use scaffolding, it might recognize the overhand hand build supports for your print inside of your print, you just might have to mess around with the scaffolding settings a bit.</p>

CC BY-SA 4.0
2021-05-19T19:23:16.757Z
2021-05-26T21:32:24.373Z
2021-05-26T21:32:24.373Z
alexjshepler
<p>Print with Supports, Standard, Everywhere.</p>
<p>You'll get some external supports that may require sanding or scraping to smooth the attachment marks (it may be possible to use further Cura tricks to block those if this model normally doesn't need supports), but &quot;Everywhere&quot; will cause Cura to create supports that sit <em>on the model</em> -- hence inside the hollow body.  I've seen them <em>inside a 3 mm diameter horizontal hole</em>.  You can then adjust &quot;support infill&quot; to create what amounts to a (slightly inefficient) infill in the part of the model that's made as a hollow.</p>
<p>I'd recommend trying this first with a large nozzle and thick layers, to speed printing for the test (&quot;draft mode&quot;), but I have every reason to believe it will work.</p>

CC BY-SA 4.0
2021-05-27T11:31:06.463Z
2021-05-27T11:31:06.463Z
Zeiss Ikon
<p>Sorry, I'm new in 3D printing and modeling and I need help.</p>
<p>I bought a 3D model with a hollow part of the body that doesn't print on my printer normally (with very high resolution (layer is 0.12 mm, the nozzle is 0.4 mm) because the walls are very thin).  I tried to make it as a solid in MeshMixer or ZBrush, but  I can't.  Can you help me, how I can fix this defect?</p>
<p>I use Cura for slicing.</p>
<p>I know, that I can take a thinner nozzle (0.2 mm) and Cura will slice it better, but I want to make this model solid so I could print it with nozzle 0.4 mm.</p>
<p><a href="https://i.sstatic.net/QqOdU.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/QqOdU.png" alt="Hollow part of body" /></a></p>
<p><a href="https://i.sstatic.net/VZNwk.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/VZNwk.jpg" alt="How Cura have sliced that" /></a></p>

CC BY-SA 4.0
2021-05-14T17:20:27.947Z
that is 100% a problem of the model. Those chest areas have their vertices inside-out.
Trish
CC BY-SA 4.0
2021-05-15T16:29:25.947Z
@Trish, Hi! Thank you for you answer. Can you help me fix that model? (I'll share model for you)
0xDEADBEEF
CC BY-SA 4.0
2021-05-15T17:39:25.040Z
https://3dprinting.stackexchange.com/a/15881/8884 could help
Trish
<3d-models><troubleshooting><meshmixer>
Fill hollow part of body in the 3D model
0xDEADBEEF
# Fill hollow part of body in the 3D model

(Asked by: username_0 on 2021-05-12)

Sorry, I'm new in 3D printing and modeling and I need help.

I bought a 3D model with a hollow part of the body that doesn't print on my printer normally (with very high resolution (layer is 0.12 mm, the nozzle is 0.4 mm) because the walls are very thin). I tried to make it as a solid in MeshMixer or ZBrush, but I can't. Can you help me, how I can fix this defect?

I use Cura for slicing.

I know, that I can take a thinner nozzle (0.2 mm) and Cura will slice it better, but I want to make this model solid so I could print it with nozzle 0.4 mm.

[![Hollow part of body](https://i.sstatic.net/QqOdU.png)](https://i.sstatic.net/QqOdU.png)

[![How Cura have sliced that](https://i.sstatic.net/VZNwk.jpg)](https://i.sstatic.net/VZNwk.jpg)

**Tags:** 3d-models, troubleshooting, meshmixer
> **Comments:**
> **username_1**: that is 100% a problem of the model. Those chest areas have their vertices inside-out.  
> **username_0**: @Trish, Hi! Thank you for you answer. Can you help me fix that model? (I'll share model for you)  
> **username_1**: https://3dprinting.stackexchange.com/a/15881/8884 could help  

---

## 3 answers

### Answer by username_1 on 2022-06-22. Score: 1

The model clearly contains an enclosed surface, which is directed to the inside - in other words, it was modeled to contain a volume of air.

Those surfaces need to be removed to print the body solid. To do this, you could check if those surfaces constitute a separate shell for meshmixer. If yes, you can just go, run separate shells, remove those internal items, and then re-merge all other shells. Slicing that should result in the voids being filled.

If however the shell is meant to exist, then it should instead simply get its normals inverted. This is best done with modeling software such as blender. Some steps you need can be seen [here](https://3dprinting.stackexchange.com/a/15881/8884)


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### Answer by username_2 on 2021-05-19. Score: 0

This is a problem with the model, you need to make sure that the model isn't hollow. You might be able to get around this though if you use scaffolding, it might recognize the overhand hand build supports for your print inside of your print, you just might have to mess around with the scaffolding settings a bit.


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### Answer by username_3 on 2021-05-27. Score: 0

Print with Supports, Standard, Everywhere.

You'll get some external supports that may require sanding or scraping to smooth the attachment marks (it may be possible to use further Cura tricks to block those if this model normally doesn't need supports), but "Everywhere" will cause Cura to create supports that sit *on the model* -- hence inside the hollow body. I've seen them *inside a 3 mm diameter horizontal hole*. You can then adjust "support infill" to create what amounts to a (slightly inefficient) infill in the part of the model that's made as a hollow.

I'd recommend trying this first with a large nozzle and thick layers, to speed printing for the test ("draft mode"), but I have every reason to believe it will work.


---

