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Jwo
 Jwo
(@jwo)
Member
Layer lines problem

Hello everyone,

I've been getting some visible layer lines at a certain height when printing but somehow only in a specific type of prints (large box-like models)

The problem.

A fine print.

What could it be and how do I troubleshoot this problem?

 

Thank you all in advance.

Posted : 23/01/2026 2:27 pm
jan.d.slay
(@jan-d-slay)
Estimable Member
RE: Layer lines problem

I've been getting some visible layer lines at a certain height when printing but somehow only in a specific type of prints (large box-like models)

I'm guessing that the floor ends right at that line behind it and only the wall continues upwards?

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Posted : 23/01/2026 2:42 pm
hyiger
(@hyiger)
Noble Member
RE:

This is the classic benchy hull line problem. In short it won’t be simple to eliminate. You have a floor with infill, several top layers and a wall. You can research online (there is a recent YouTube video) that describes and provides some solutions to the problem. The short answer is it’s not trivial to get rid of them. An easy way if you don’t mind the appearance is to use a fuzzy skin. 

Getting rid of layer lines in general can be done by switching to matte or carbon fiber filaments. 

This post was modified 1 day ago by hyiger
Posted : 23/01/2026 3:44 pm
1 people liked
FoxRun3D
(@foxrun3d)
Illustrious Member
RE: Layer lines problem

Or search this forum for "buldge" (sic). Dozens of pages, no generally applicable solution. 

Formerly known on this forum as @fuchsr -- https://foxrun3d.com/

Posted : 23/01/2026 4:06 pm
1 people liked
PaKo
 PaKo
(@pako)
Eminent Member
RE: Layer lines problem

Hi, try "External perimeters first" option in "Advanced section" of "Layers and perimeters" settings. (slicer must be switched into "Expert" mode)

Posted : 23/01/2026 7:21 pm
1 people liked
brianjordan
(@brianjordan-2)
Eminent Member
RE: Layer lines problem

 

Posted by: @jwo

Hello everyone,

I've been getting some visible layer lines at a certain height when printing but somehow only in a specific type of prints (large box-like models)

The problem.

A fine print.

What could it be and how do I troubleshoot this problem?

 

Thank you all in advance.

This, from Slant 3D, is a comprehensive explanation of this issue.

Flashforge finder>Flashforge Creator Pro>Prusa MK3S>Prusa MK4S>???

Posted : 23/01/2026 7:36 pm
1 people liked
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