Seam-like artifacts around deretractions
 
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tjhorner
(@tjhorner)
Member
Seam-like artifacts around deretractions

(I wasn't sure whether to post this in the CORE One or PrusaSlicer category, but since I can seemingly resolve this issue by using OrcaSlicer I have decided to post it here.)

When I slice a model using PrusaSlicer for my CORE One (with Prusament PLA Blend) using essentially default settings (tweaks to seam position, scarf joint, infill pattern, enable skirt) I am seeing seam-like artifacts around where deretractions happen. This is definitely not the actual seam as indicated by the g-code preview. The best way to demonstrate this is through example; you can see the deretractions here in the preview:

You can also see the seam indicated by the white line at the rear of the model. The finished part clearly has seam-like artifacts around these points of deretraction.

I ran a full suite of calibrations to rule out poor maintenance, but the problem remains. Would appreciate any guidance on this. I noticed the problematic deretractions are on the innermost perimeter so I'm increasing the number of perimeters to 3 to see if that mitigates it.

Here's the exact project file I am using for this test: moai-seam-test.3mf

Posted : 17/03/2026 7:18 am
tjhorner
(@tjhorner)
Member
Topic starter answered:
RE: Seam-like artifacts around deretractions

Update: The problem is still present after trying with 3 perimeters instead of 2. Looking at the volumetric flow preview, I think it may be the scarf seams causing these artifacts instead. Disabling them to see if it makes a difference.

Posted : 17/03/2026 4:16 pm
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