<p>I'm going off limited information here, if you could provide a full view of the model that would help.</p>
<p>That being said;
It looks like there is a feature on the opposite side of the wall &quot;pulling&quot; the lines towards the outside.
There is no direct setting to change to fix this, it looks like the layer size is limiting how close the printer can mimic the geometry.</p>
<p>Try dropping the layer height drastically (ie. .02 to .01) in order to see if the indentation changes it's shape.
Alternately, change the orientation to non-ideal angles and see what changes.</p>
<p>At the core, it seems your issue is the actual interpretation of the model by the slicing software and may not have a setting associated with it.</p>

CC BY-SA 4.0
2022-10-12T17:56:27.170Z
I added some pictures to my post. The indentation goes all the around that pocket. The slicer should be able to leave such a gap in the infill or inner wall instead of on the outer wall, or even vary with trace width to account for whatever is doing this.
I tried to reduce the wall count to 1 with no effect, I have 5 set for the slice preview. No effect with layer height changes.
Gabriel Lambert
CC BY-SA 4.0
2022-10-12T20:49:37.287Z
Ok, lets dig into this some more then. Is this the latest Cura release (5.1)? Do you have access to standard CAD software (SolidWorks, Blender, ChituBox, Fusion, etc.)? Have you tried 0%, 1%, 5%, 95%, 99%, and 100% infill? You have quite the conundrum here, assuming you have all the above already done - I would say you want a complete rebuild, i.e. importing the mesh into a CAD program, converting the mesh to a solid, converting the solid back to a mesh/STL. If that doesn't work then I would assume it has to be a setting issue in Cura. If this file is publicly available, you should share it.
Akhenaten
CC BY-SA 4.0
2022-10-10T18:11:36.143Z
2022-10-10T18:11:36.143Z
Akhenaten
<p>Could anyone help me diagnose the setting or issue causing the effect in the second picture (indentation in a perfectly flat wall)?</p>
<p>The vertical wall should be flat, as shown in the first picture of the STL model.</p>
<p><a href="https://i.sstatic.net/PQjB4.png" rel="nofollow noreferrer" title="STL showing perfectly flat walls"><img src="https://i.sstatic.net/PQjB4.png" alt="stl" title="STL showing perfectly flat walls" /></a></p>
<p><a href="https://i.sstatic.net/35gu3.png" rel="nofollow noreferrer" title="G-code lines show indentation"><img src="https://i.sstatic.net/35gu3.png" alt="G-code" title="G-code lines show indentation" /></a></p>
<p><a href="https://i.sstatic.net/vKTmO.png" rel="nofollow noreferrer" title="View from other side"><img src="https://i.sstatic.net/vKTmO.png" alt="view from other side" title="View from other side" /></a></p>
<p><a href="https://i.sstatic.net/XZ17H.png" rel="nofollow noreferrer" title="Indentation going all the way around"><img src="https://i.sstatic.net/XZ17H.png" alt="indentation going all the way around" title="Indentation going all the way around" /></a></p>

CC BY-SA 4.0
2022-10-09T01:17:45.820Z
You need to show us which wall you are talking about. I see several walls that are not vertical.
Davo
CC BY-SA 4.0
2022-10-10T04:52:44.270Z
If you compare the slice preview to the stl you will notice the indentation I'm talking about where it should be flat. If I still need to point it out, look at the bottom left of the image.
Gabriel Lambert
CC BY-SA 4.0
2022-10-10T09:29:11.580Z
Have you checked that the stl is error free?
Kilisi
CC BY-SA 4.0
2022-10-10T19:01:22.593Z
can you pull down to look *into* the affected layers?
Trish
CC BY-SA 4.0
2022-10-11T15:16:22.990Z
Could you post the STL as a link or on e.g. Thingiverse? We can then try ourselves.
0scar
CC BY-SA 4.0
2022-10-12T18:01:17.240Z
added some pictures, I cant post the model. 
Model comes from Autodesk Inventor STL export, I never had stl errors doing this. 
Indentation goes all the way around the pocket of what should be a perfectly flat wall.
Gabriel Lambert
CC BY-SA 4.0
2022-10-12T18:37:18.797Z
Cura 5.2 is in Beta, have you tried a non beta release like e.g. 5.1.1? Also post a picture of the printed object, is the indentation present? Else it might be a drawing error, not an actual printing problem. This has happened in the past with Cura before if I remember correctly, I even think we have had a question on that before.
0scar
<ultimaker-cura><slicing>
Cura 5.2 beta, flat wall indentation
Gabriel Lambert
# Cura 5.2 beta, flat wall indentation

(Asked by: username_0 on 2022-10-08)

Could anyone help me diagnose the setting or issue causing the effect in the second picture (indentation in a perfectly flat wall)?

The vertical wall should be flat, as shown in the first picture of the STL model.

[![stl](https://i.sstatic.net/PQjB4.png "STL showing perfectly flat walls")](https://i.sstatic.net/PQjB4.png "STL showing perfectly flat walls")

[![G-code](https://i.sstatic.net/35gu3.png "G-code lines show indentation")](https://i.sstatic.net/35gu3.png "G-code lines show indentation")

[![view from other side](https://i.sstatic.net/vKTmO.png "View from other side")](https://i.sstatic.net/vKTmO.png "View from other side")

[![indentation going all the way around](https://i.sstatic.net/XZ17H.png "Indentation going all the way around")](https://i.sstatic.net/XZ17H.png "Indentation going all the way around")

**Tags:** ultimaker-cura, slicing

> **Comments:**
> **username_1**: You need to show us which wall you are talking about. I see several walls that are not vertical.  
> **username_0**: If you compare the slice preview to the stl you will notice the indentation I'm talking about where it should be flat. If I still need to point it out, look at the bottom left of the image.  
> **username_2**: Have you checked that the stl is error free?  
> **username_3**: can you pull down to look *into* the affected layers?  
> **username_4**: Could you post the STL as a link or on e.g. Thingiverse? We can then try ourselves.  
> **username_0**: added some pictures, I cant post the model.  Model comes from Autodesk Inventor STL export, I never had stl errors doing this.  Indentation goes all the way around the pocket of what should be a perfectly flat wall.  
> **username_4**: Cura 5.2 is in Beta, have you tried a non beta release like e.g. 5.1.1? Also post a picture of the printed object, is the indentation present? Else it might be a drawing error, not an actual printing problem. This has happened in the past with Cura before if I remember correctly, I even think we have had a question on that before.  

---

## 1 answers

### Answer by username_5 on 2022-10-10. Score: 1

I'm going off limited information here, if you could provide a full view of the model that would help.

That being said;
It looks like there is a feature on the opposite side of the wall "pulling" the lines towards the outside.
There is no direct setting to change to fix this, it looks like the layer size is limiting how close the printer can mimic the geometry.

Try dropping the layer height drastically (ie. .02 to .01) in order to see if the indentation changes it's shape.
Alternately, change the orientation to non-ideal angles and see what changes.

At the core, it seems your issue is the actual interpretation of the model by the slicing software and may not have a setting associated with it.

> **Comments:**
> **username_0**: I added some pictures to my post. The indentation goes all the around that pocket. The slicer should be able to leave such a gap in the infill or inner wall instead of on the outer wall, or even vary with trace width to account for whatever is doing this. I tried to reduce the wall count to 1 with no effect, I have 5 set for the slice preview. No effect with layer height changes.  
> **username_5**: Ok, lets dig into this some more then. Is this the latest Cura release (5.1)? Do you have access to standard CAD software (SolidWorks, Blender, ChituBox, Fusion, etc.)? Have you tried 0%, 1%, 5%, 95%, 99%, and 100% infill? You have quite the conundrum here, assuming you have all the above already done - I would say you want a complete rebuild, i.e. importing the mesh into a CAD program, converting the mesh to a solid, converting the solid back to a mesh/STL. If that doesn't work then I would assume it has to be a setting issue in Cura. If this file is publicly available, you should share it.  

---

