3DP Bottom thickness bug?

Anyone else notice their bottom thickness is wrong? Printing in higher quality modes seems fine, but in default “fast” settings:

bottom: 0.8mm
layer height: 0.24mm
initial layer height: 0.28mm

… I end up with 6 bottom layers in luban. even rounding up without a thicker initial layer height, I should only have 4 bottom layers.

After bumping up to 0.4mm layer height, I still have 6 bottom layers. Is that a programmed minimum somewhere in Luban, perhaps? Am I missing a setting somewhere?


I have been having the same issue. I am trying to print a model with only 1 bottom layer and have not been able to do so in Luban. I ended up using Cura.