New features:
Incremental real-time slicing: when you change a setting, slicing doesn't restart from scratch but only recalculates the affected parts. Also, when repositioning objects in plater or changing most options no recalculation is needed at all
Toolpaths preview
3D preview of plater
Customizable bed shape (rectangular, circular, or completely custom)
New 3D honeycomb fill pattern (credits to David Eccles/gringer for his research work, #1646)
Rotate/mirror/scale around X,Y,Z
New XY Size Compensation option for handling dimensional tolerance
Separate extrusion width setting for external perimeters (defaults to a thin extrusion for better quality, while internal loops use a thicker extrusion for better adhesion)
Contextual menu when right-clicking an item in plater
New --split command line option
Improvements:
Avoid crossing perimeters is now much faster (but more work is planned on it)
Option controls are enabled/disabled dynamically according to their dependency from others
Perimeters of adjacent volumes having the same settings are merged
Skirt is printed outside brim to prevent conflicts (#2157)
Removed duplicated M204 commands (#2183)
Changes:
A minor change was applied in flow math that should reduce thickness of external perimeters by 0.02-0.06mm thus reducing dimensional issues for holes
The "Combine STL files into multi-material AMF file" command was removed since the new Object Settings dialog provides a more flexible and interactive way for loading multi-part objects
Collision checks are relaxed when Detect thin walls is disabled, for faster processing
Bugfix:
Some locale issues were arising when loading config files