@bot I have checked extrusion width and layer height settings.
I had explicitly set widths at the beginning of my PS configuration. I remember the PS defaults were too weird regarding the references used...
I remember having played with the extrusion width and had them set all to 0.4 mm (nozzle size) for a test, to see if there's an impact. But no luck on that side.
@Phaedrux @engikeneer You were on the right track with the shrinkage / cooling setting.
I have done a test print with no layer fan on layer 1 and 50% fan on other layers. The result is much better.
Thanks for your valuable advices.
I still have a small elephant foot on bottom solid infill and first layer is a bit too large (Z offset has been made remotely with DWC with a pitch of 0.05 instead of 0.02 on the panel due) and last layer of the top solid infill also (flow rate still too high for that material for the ironing)
The blue material is ColorFabb on Demand and depending on the colors, it can be very tricky.
I'm doing another test print using PolyTerra for the main part to confirm.
@Phaedrux @engikeneer
I do confirm that the issue was the cooling settings.
The ColorFabb On Demand filament, in that particular color, is prone to create the issue.
Polyterra filament does not create any issue with the constant cooling setting as in S3D
@Phaedrux @engikeneer
I do confirm that the issue was the cooling settings.
The ColorFabb On Demand filament, in that particular color, is prone to create the issue.
Polyterra filament does not create any issue with the constant cooling setting as in S3D
@Phaedrux @engikeneer You were on the right track with the shrinkage / cooling setting.
I have done a test print with no layer fan on layer 1 and 50% fan on other layers. The result is much better.
Thanks for your valuable advices.
I still have a small elephant foot on bottom solid infill and first layer is a bit too large (Z offset has been made remotely with DWC with a pitch of 0.05 instead of 0.02 on the panel due) and last layer of the top solid infill also (flow rate still too high for that material for the ironing)
The blue material is ColorFabb on Demand and depending on the colors, it can be very tricky.
I'm doing another test print using PolyTerra for the main part to confirm.
@phaedrux Yes, not as simple as a simple shrinkage.
I was a bit quick when setting up the cooling options, it's not as straight forward as on S3D or Cura.
I will do a new test print with PS with no variable fan cooling : 50% starting on layer 2 and always on.
I'll keep you updated 
@engikeneer
It looks like the layers were the issue happens are infill layers were the fan is on. For bottom and top solid layers, nearly no fan.
With S3D I have a constant 50% fan on starting layer 2 an 15% on first layer.
PS is making is own fan speed profile from 15 % to 50 % with my current parameters.
I need to get back to something much simpler and close to S3D first to see if it has an impact.
I will do the test tomorrow morning, when back in the office.
@engikeneer said in Issues with PrusaSlicer:
Have you check what the temperatures and cooling fan percentages are between the two slicers? I know PrusaSlicer can display the cooling fan % thought the gcode preview
Temperature is even throughout the whole print.
I need to dig much more into the cooling settings as PS is fiddling with it. That’s a difference with S3D. Maybe the cause.
Setting the default extrusion width to 0.42 for a 0.4 nozzle didn’t solved the issue.
@phaedrux
The part is printed in PLA, so shrinkage is minimal.
Remember the same part with same material on the same printer printed with S3D with the same main parameters turns out well
@engikeneer I 100% sure of my bed adhesion.
Many years of practice as a 3d printing service provider.
@bot The nozzle diameter has been set to 0.4 mm for all my 8 extruders (using a Mosaic Palette 3 Pro)
So except for the support material, I'm in the standard settings.
I will make another try tomorrow, setting the default extrusion width a bit above the nozzle diameter as suggested.
Maybe having the default extrusion width = nozzle diameter is causing the issue.
@bot I have checked extrusion width and layer height settings.
I had explicitly set widths at the beginning of my PS configuration. I remember the PS defaults were too weird regarding the references used...
I remember having played with the extrusion width and had them set all to 0.4 mm (nozzle size) for a test, to see if there's an impact. But no luck on that side.
@bot said in Issues with PrusaSlicer:
@v3dprinting I was not aware of elephant foot compensation on S3D. Are you manually creating that by using multiple processes?
Yes, correct. I have a first process with the first layer only and an horizontal size compensation of half the nozzle diameter.