Hello

This PrusaSlicer/slic3r fork should be up do to date with the latest release of PrusaSlicer, but it has nothing to do with Prusa Research, it's a personal fork for my use. Don't blame them if something don't work, it's my fault. It add some options and bugfixes. These may be merged back into PrusaSlicer (and/or main slic3r) in the future, if they wanted it and have the time to do so, but for some they need major changes in the software.

note: most are new settings you can activate/deactivate

Changelog (last update 2020-05-28):

infill:

• ~gyroid infill~ (now merged inside slic3r and slic3rPE) (now with Yuri D'Elia additions)
• better connected lines for gyroid infill (& 3D honeycomb)
• ironing infill
• concentric + gapfill infill (don't leave gaps, like the perimeters)
• rectilinear + gapfill infill (better coverage where there are small surfaces)
• scattered rectilinear infill (random infill) (by @thenickdude)
• do not connect lines of infill
• denser infill below the first solid (top) layer
• ensure all solid infill extrude just the volume of plastic needed (not 99% or 101% but 100%)
• over-bridge flow compensation : allow to over-extutrude the layer over a bridge to catch the good z-height.

perimeters:

• extra perimeters if needed : add perimeter to not have infill over overhangs
• option to not have perimeters on bridge area, to be able to print counter-bore holes.
• only one perimeter on top area
• loop the perimeters to create one big loop.
• new option for seam ( 'nearest', moved the old 'nearest' to 'hidden')
• with 'external perimeter first', new option 'vase mode' to hide the seam
• can 'external perimeter first' for only holes or/and the outside.
• better thin walls (with an option for the 'min size' threshold)
• better gap fill (same than thin walls) and option to not extrude it if it's too small.

support:

• can transform the first layer of the raft to a solid layer (support are printed over a 1-layer raft)
• split the z gap:
• * now you can select the z-gap mode: soluble filament (no z-distance), calculate from the filament, calculate based on the layer position.
• * bottom z-gap (part => support)
• * top z-gap (support => part)
  • add a (experimental) 3D interface pattern.

skirt & brim:

• brim ears (print brim-ears around corners)
• interior brim
• brim on parts/islands inside a "hole"
• brim & skirt are printed per object instance if "complete individual object" (can be deactivated for skirts)
• brim offset
• brim settings per object
• now supports doesn't push the brim away.

advanced & others:

• you can now set the size of the anchor the solid layers & bridge layer are grow of.
• xy hole compensation (only for convex holes)
• convert circular hole to polyhole (polygon selected from hole diameter & extrusion width)
• XY curve smoothing (add points to better approximate a cylinder from existing polygons, to remove the felling of triangles you can have when touching a printed cylinder)
• ~export part begin /end to be compatible with cancelobject (octoprint plugin)~ (now merged inside slic3r and slic3rPE)
• remove co-linear points ( )

filament:

• fan speed for top infill
• max speed for wipe tower
• auto-sized wipe tower based on filament pigment.
• skinnydip routine from Erik Bjorgan (domesticatedviking)

hardware/printer:

• option for "no lift for top solid infill"
• "fan delay" to start the part cooling fan a bit earlier to take into account the time it needs to start.
• machine limits available for every firmware, with 'time estimation compensation' for better estimation

ui:

• calibration test prints, generated specifically for the current profile.
• customisable setting windows
• show the consumption for each filament if using 'color print'.
• separate settings & color for thin walls

fix / too small changes:

• too bored to list them all. Things like "this select box is a bit bigger" "this setting now can be entered with a %", etc...