PrusaSlicer 2.9.1 improves multi-material printing and simplifies sequential 3D printing

Czech 3D printing specialist Prusa Research has released version 2.9.1 of its slicer PrusaSlicer. The new version primarily enhances the software with improved support for sequential printing and optimizes the connection of different materials in multi-material printing.

Previously, users usually had to print objects simultaneously and layer by layer, which meant that one error often destroyed all components. With Smart Sequential Printing Arrange, the slicer now automatically places the objects so that the printer produces them one after the other. This is made possible by a specially developed algorithm that Kryštof Kohout developed together with researchers from the Technical University of Prague. The algorithm automatically calculates collision-free positions of the individual parts on the printing plate. The process currently only supports Prusa printers, but could also include other models in the future.

Another new feature is the improved connection of different filaments using the so-called beam interlocking process. Here, the slicer creates internal, interlocking structures that stably connect different materials without leaving visible traces on the surface. Previously, users had to resort to specially designed connecting elements to ensure the stability of such components. The function was originally developed for Ultimaker Cura and later adopted in OrcaSlicer. It is now also available to PrusaSlicer users.

In addition, the automatic generation of support structures for SLA prints has been improved. The new algorithm reliably recognizes critical areas on the model, now reacts to manually set support points and generates a consistent result without random variations. Different support types are highlighted in color, giving users better control over the results.

More details about the update and downloads are available on GitHub.