Odd slicing behavior
Hello,
I was wondering if anyone can tell me why when I slice this stl for some reason prusaslicr adds an odd step on the very top layer. Have sliced it in cura and it does not have this odd top layer step. While I have tried to see if for some reason the model is not "flat" on the build plate, but not matter what I do it does not seem to go away.
The model before I slice it 
Model after I slice it, you can see on the top layer the odd step up. 
RE: Odd slicing behavior
Hi Angelus0313,
Please share your model to test it.
Regards
RE: Odd slicing behavior
Your model isnt flat on the top. Basically a few verts will be fractionally off the same plane. Enough that one edge is high enough to produce another layer from the very slight slope.
You can try and use the place to face tool to flip it around and then back again. That sometimes works.
You could fix the model.
You could change the layer height in that area using a height range modifier such that the verts are all on one thicker (or thinner layer).
Further reading at https://github.com/prusa3d/PrusaSlicer/issues/1448 or https://github.com/prusa3d/PrusaSlicer/issues/2434 (from the PS github FAQ https://github.com/prusa3d/PrusaSlicer/wiki/Frequently-Asked-Questions-(FAQ)
RE: Odd slicing behavior
Thanks for the github links, as I finally got it fixed through a combination of playing with the height and just changing the rotation .01 at a time.
I was thinking the same thing like an odd vert, but when I ran it through the methods I use to fix stray verts it seemed to not detect anything. That or I was missing it due to I had already spent a few hours trying to fix and was manually going through the model one vert at a time to find the odd one.
Thanks again for the input.