Hi @User_6914 looks to me like you don’t have enough top layers. I usually aim for at least 1mm thickness for both top and bottom and/or 5-6 layers, depending on layer height, so you’d only need 5 layers at 0.2mm layer height, but maybe as many as 10 for 0.1mm height (though 8 is usually enough). If I’m reading the screenshots correctly (and I apologise, I don’t use Cura), it looks like you’ve only got 3 layers top/bottom (0.6 thickness, 0.2mm layer height) and that’s rarely going to be enough. Try increasing your top/bottom thickness to 1.0.