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Hello @SimiDitto. Cura behaves that way because it is being a little lazy when you print outer walls first. In the situation where the hole(s) in the object lie very close to the outer perimeter you will have a reduced number of walls because the gap isn't big enough for them all. In that situation if it printed all of the perimeter walls first one of the perimeter inner walls could be touching the outer wall of one or more holes and so it would not be obeying the setting. So to ensure that all of the outer walls are printed first it prints the perimeter outer wall and then the outer to inner walls of the holes and then goes back to print the inner walls of the perimeter. It could spend more time determining if the holes are close enough to the perimeter for that to happen but it doesn't. Hope this makes sense.
The part is big enough to accommodate all walls and skin, so the walls are not touching. Just to be sure, I tested on a 200x200mm square with a hole in the middle, and does the same thing.
Best regards,
Razvan
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Hello @SimiDitto. Cura behaves that way because it is being a little lazy when you print outer walls first. In the situation where the hole(s) in the object lie very close to the outer perimeter you will have a reduced number of walls because the gap isn't big enough for them all. In that situation if it printed all of the perimeter walls first one of the perimeter inner walls could be touching the outer wall of one or more holes and so it would not be obeying the setting. So to ensure that all of the outer walls are printed first it prints the perimeter outer wall and then the outer to inner walls of the holes and then goes back to print the inner walls of the perimeter. It could spend more time determining if the holes are close enough to the perimeter for that to happen but it doesn't. Hope this makes sense.
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