<p>I designed a very simple boat in Tinkercad and then I printed it. No problem, but I wanted it a bit wider. So I made it wider in Tinkercad and printed it again. This second version has a crack in the right side and it had some PLA mess in the boat. I thought nothing of it and printed it again. This third print also has this crack and some leftover PLA in the boat. So I checked out the design in Tinkercad, Cura, and in the print preview in Cura. Below are the results:</p>
<p><a href="https://i.sstatic.net/76n6d.png" rel="nofollow noreferrer" title="Screenshot of a boat modeled in Tinkercad"><img src="https://i.sstatic.net/76n6d.png" alt="Screenshot of a boat modeled in Tinkercad" title="Screenshot of a boat modeled in Tinkercad" /></a></p>
<p><a href="https://i.sstatic.net/rNsNl.png" rel="nofollow noreferrer" title="Screenshot of a boat rendered in Cura's preview"><img src="https://i.sstatic.net/rNsNl.png" alt="Screenshot of a boat rendered in Cura's preview" title="Screenshot of a boat rendered in Cura's preview" /></a></p>
<p><a href="https://i.sstatic.net/gJzWN.png" rel="nofollow noreferrer" title="Screenshot of a boat rendered in Cura's preview showing a ghost layer after the model was modified"><img src="https://i.sstatic.net/gJzWN.png" alt="Screenshot of a boat rendered in Cura's preview showing a ghost layer after the model was modified" title="Screenshot of a boat rendered in Cura's preview showing a ghost layer after the model was modified" /></a></p>
<p>As you can see, the last image (the print preview) suddenly has this one (yellow-colored) layer which moves across the inner part of the boat. Exactly there, the boat also misses one layer from the hull, making a crack in the hull.</p>
<p>I then recreated the side in Tinkercad, exported another STL, and imported it into Cura again. But the ghost layer is still there. I finally tried all sorts of things, and when I recreated a little hole in the bow of the boat, the ghost layer went away.</p>
<p>I now wonder, how could this create the ghost layer across the inside of the boat at a place where the hole wasn't even located? And also, why could it only pop up on the print preview, and not in any of the other views?</p>

CC BY-SA 4.0
2022-12-30T18:46:51.920Z
What version of Cura are you using? Is it the most current version? Have you tried other versions?
agarza
CC BY-SA 4.0
2022-12-30T19:14:26.623Z
Looks like an error in slicing. Check other slicer or other version of Cura, and see if this problem still occurs.
kosteklvp
CC BY-SA 4.0
2022-12-30T22:56:51.367Z
Your STL files is probably incorrect as caused by the Tinkercad model to STL translation. There are a few questions to be found on this issue. If you're lucky, @Trish may answer your question.
0scar
CC BY-SA 4.0
2023-01-03T14:05:07.607Z
@agarza - I was using cura version 4.13.2 and I saw that the latest is 5.2.1 which I just installed. Using that, the weird ghost line is indeed vanished. Thanks for the tip! I install most of my software using an automatic updating system (apt/flatpak/snap), but I've must have installed this using something else.
kramer65
<ultimaker-cura><layer-shifting><ghosting>
Where did Cura get this ghost layer from?
kramer65
# Where did Cura get this ghost layer from?

(Asked by: username_0 on 2022-12-30)

I designed a very simple boat in Tinkercad and then I printed it. No problem, but I wanted it a bit wider. So I made it wider in Tinkercad and printed it again. This second version has a crack in the right side and it had some PLA mess in the boat. I thought nothing of it and printed it again. This third print also has this crack and some leftover PLA in the boat. So I checked out the design in Tinkercad, Cura, and in the print preview in Cura. Below are the results:

[![Screenshot of a boat modeled in Tinkercad](https://i.sstatic.net/76n6d.png "Screenshot of a boat modeled in Tinkercad")](https://i.sstatic.net/76n6d.png "Screenshot of a boat modeled in Tinkercad")

[![Screenshot of a boat rendered in Cura's preview](https://i.sstatic.net/rNsNl.png "Screenshot of a boat rendered in Cura's preview")](https://i.sstatic.net/rNsNl.png "Screenshot of a boat rendered in Cura's preview")

[![Screenshot of a boat rendered in Cura's preview showing a ghost layer after the model was modified](https://i.sstatic.net/gJzWN.png "Screenshot of a boat rendered in Cura's preview showing a ghost layer after the model was modified")](https://i.sstatic.net/gJzWN.png "Screenshot of a boat rendered in Cura's preview showing a ghost layer after the model was modified")

As you can see, the last image (the print preview) suddenly has this one (yellow-colored) layer which moves across the inner part of the boat. Exactly there, the boat also misses one layer from the hull, making a crack in the hull.

I then recreated the side in Tinkercad, exported another STL, and imported it into Cura again. But the ghost layer is still there. I finally tried all sorts of things, and when I recreated a little hole in the bow of the boat, the ghost layer went away.

I now wonder, how could this create the ghost layer across the inside of the boat at a place where the hole wasn't even located? And also, why could it only pop up on the print preview, and not in any of the other views?

**Tags:** ultimaker-cura, layer-shifting, ghosting

> **Comments:**
> **username_1**: What version of Cura are you using? Is it the most current version? Have you tried other versions?  
> **username_2**: Looks like an error in slicing. Check other slicer or other version of Cura, and see if this problem still occurs.  
> **username_3**: Your STL files is probably incorrect as caused by the Tinkercad model to STL translation. There are a few questions to be found on this issue. If you're lucky, @Trish may answer your question.  
> **username_0**: @username_1 - I was using cura version 4.13.2 and I saw that the latest is 5.2.1 which I just installed. Using that, the weird ghost line is indeed vanished. Thanks for the tip! I install most of my software using an automatic updating system (apt/flatpak/snap), but I've must have installed this using something else.  

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## 0 answers

