TomKamphuys

Thanks for your time and effort.

I think I did what you told me. Strange. In the mean time I have found what triggers it: Changing the ironing pattern between concentric and zigzag, turns the yellow artefacts on and off. So keeping the ironing at zigzag solves the problem. Selecting 'Iron only highest layer' also solves the problem (even with concentric ironing). Is this expected behaviour?

I already posted that 3mf file and you used it already 🙂

Thanks for your answer. And although it is affected by the layer height, it is not the only element at play. In my case it happens also quite a bit higher up where the layers are much more directly on top of each other. Here is a comparison of (slightly) other model, sliced in a different Cura version and with a different printer (so perfect for comparison...) : I think I finally succeeded in capturing the transition clearly.

Maybe this is a clearer image. It is another model, but it exhibits the same problem. N.B. This is a zoomed in image of the transition area, which can be seen in the center part of the part below: The outside does not have these yellow lines in the Cura: And the print in noticably cleaner on the outside:

I have an Elegoo Neptune 3 Pro. It's not dependent on the physical printer, as it is already present in the layer view. I attached the file. Petal.3mf

After slicing my model, some red shell lines have a yellow 'artifact'. It's not just rendering as it shows up in the actual printed object: It's hard to capture on camera, but the 'yellow-ish' lines actually stick out a bit. What causes this and can I solve this? I'm quite new to 3D printing, so please bear with me...