PLA top surface defects (pillowing)?

[frank.d]

Hi,

There are some threads regarding this problem. Found this one helpful:

Top surface defects due to incorrect internal bridging

Hi, I actually think I’ve got some of the root cause figured out for this specific print, but I thought I’d share some of what I learned and I still am looking for suggestions in case there is actually a “correct” fix for this. It seems like a slicer bug / “feature.” I have printed 1000+ hours on my printers and am very familiar with the behavior of the PLA I use, but for the first time I started printing a very organic structures with variable layer height (at very high quality - heights rang…