Special modes

Print sequence

When more objects are placed on the build plate, you can define in which sequence they should be printed. This option is only available on single extrusion machines. There are two options:

  • All at once: All objects are printed at the same time, which means that it will print one layer of each object before going to the next layer.
  • One at a time: Objects will be printed one by one. This mode can only be used if the models are smaller than the gantry height, which is the distance between the build plate and lowest print head shaft.


The selected model will be printed in negative, with a wall surrounding it, so you can use the finished print as a mold for other materials. It has a few options available:

  • Minimal mold with: This specifies the minimum width of the mold.
  • Mold roof height: This specifies the height of the mold above horizontal parts in your model.
  • Mold angle: The maximum angle the mold may make on the outside of the model. This way, there is no support necessary on the outside of the mold.

The ultimaker robot, sliced with the mold setting enabled.

Surface mode

Surface mode will print the X-Y surface of the mesh (walls) only instead of the solid model. Top/bottom, infill and supports are not generated in this mode.  This used to be called ‘Only follow mesh surface’. In addition to the ‘surface mode’ and ‘normal’, a ‘both’ mode has now been added. This ensures all closed volumes are printed as normal and all loose geometry as single walls.


This mode prints a shell quickly and efficient. It is often used to print quick rings and other single shelled models.

Spiralize outer contour

Spiralize smooths out the Z move over the edge. This means that the Z-stage will gradually move down over the whole print (like a spiral). Solid objects are turned into single-walled prints with a solid bottom by using this option, which is perfect for printing vases for example.