OrcaSlicer 2.4: the visual and multi-material leap really arrives?

OrcaSlicer 2.4.0: realistic rendering, cloud and advanced multi-material

OrcaSlicer 2.4.0 arrived in stable version on June 20, 2026. For those coming from 2.3, this update brings a clear leap in visual quality, multi-material management and cloud integration.

Version 2.4.0 consolidates the new features introduced in the previous alpha and beta phases. It includes Orca Cloud for profile synchronization, Z Anti-Aliasing for smoother curved surfaces, Machine Input Shaping for modern firmware, and a completely renewed rendering engine.

Compared to 2.3.2, which focused on security fixes and configurable wipe tower, 2.4.0 represents a change of pace. The changes affect both the daily user experience and advanced technical possibilities.

Advanced rendering: see the model before printing it

Version 2.4.0 introduces graphic options that transform the 3D preview into a much more accurate verification tool. Phong shading, projected shadows, and ambient occlusion make geometric details immediately visible that were previously missed.

The old Gouraud shader remains available, but now you can activate Phong shading to see realistic reflections. L’SSAO (Screen Space Ambient Occlusion) adds depth by showing how light behaves in corners and cavities. Projected shadows complete the picture, making the relative position between multiple objects on the plate clear.

These options are activated from the 3D view menu. They are not just aesthetic: they help identify orientation issues, overlaps, and fine details before starting the print. For complex or multi-part models, the visual feedback becomes much more immediate.

Advanced rendering works both in preparation mode and in preview. Performance depends on the graphics card, but on recent hardware the impact is minimal.

Enhanced multi-material: precise filament assignment

Multi-material management in 2.4.0 allows assigning different materials to specific model features, not just to whole objects. This opens up creative and functional possibilities that were previously difficult to achieve.

Now you can choose, for example, to print the outer walls in TPU for surface flexibility, while keeping the interior and infill in PLA for structural rigidity. Assignment is done by feature type: outer perimeters, inner perimeters, top/bottom, infill, supports.

The interface for this function has been redesigned to make it more accessible. Each feature clearly shows which filament it will use, and you can modify the assignment directly from the material list. The system automatically checks compatibility between selected materials.

This feature is particularly useful for those working with MMU, filament cutter, or tool changer. It reduces waste of expensive material and allows combinations that were previously impractical without manual post-processing.

Orca Cloud: profiles synchronized everywhere

Orca Cloud, introduced in the alpha phase and now stable, allows you to synchronize printer, filament, and process profiles between different OrcaSlicer installations. For those who work on multiple computers or manage different machines, it eliminates the manual transfer of configuration files.

The platform maintains a history of profile versions. After modifying parameters, you can compare different versions and restore previous configurations. This is particularly useful during complex calibrations, when a setting improves one print but worsens another.

Preset Bundles collect printer, filament, and process profiles into a single package. You can add a description, version, images, and tags, then publish it in the Explore section to share with other users. Anyone who subscribes to a bundle automatically receives updates.

Orca Cloud is optional. Local profiles and the traditional workflow remain available. Those who prefer to work offline can continue without an account. Synchronization occurs at login, on restart, or manually.

Machine Input Shaping and firmware compatibility

Machine Input Shaping allows you to configure the frequency and damping of the X/Y axes directly from the printer settings in the slicer. The system automatically generates the appropriate G-code for the selected firmware.

The support covers Adaptive Klipper, RepRapFirmware, and Marlin 2. For Klipper, you can specify the input shaping parameters and the slicer inserts the correct commands into the G-code. This simplifies the management of printers with different firmware, avoiding manual modifications to configuration files.

The function is activated from the advanced printer settings. Once configured, it remains associated with the machine profile. For those using multiple printers with different setups, this means fewer manual interventions and less risk of error.

2.4.0 also includes native support for Bambu Lab X2D, with optimized profiles and management of the machine's hardware specifications.

Improved bridging and other optimizations

The bridging improvements, developed by the community, make bridges between supports more reliable and reduce the need for additional structures. The work of @ianalexis, @kisslorand, and other contributors has brought more precise algorithms for detecting and managing bridges.

The Gyroid infill has been optimized for speed and quality. The skirt generation has been rewritten to better handle complex cases. The processing time between slice and preview has been reduced, with the greatest gains on printers with Klipper firmware.

2.4.0 also introduces a Troubleshoot Center, a tool for diagnosing common configuration issues. Native support for Moonraker and 3DPrinterOS hosts completes the network integrations. Support for Creality K-series printers has been added with dedicated profiles.

The filament list has received usability improvements: more intuitive sorting, quick filters, and clearer display of material-printer compatibilities.

Send job as packaged 3MF

A new option allows sending sliced jobs to the printer as a packaged 3MF file instead of pure G-code. The file includes slice metadata related to object labels embedded in the G-code.

The option is located in Printer Settings → Basic Information → Advanced, under “Use 3MF instead of G-code”. It is disabled by default and works only for direct sending, not for local export. Activating it does not trigger a new slice, and the setting remains saved in the printer profile.

This format improves job traceability and facilitates the management of complex prints with multiple objects. For printers that natively support the 3MF format, it also offers better integration with queue management and history functions.

Is it worth upgrading from 2.3?

OrcaSlicer 2.4.0 brings concrete improvements that touch various aspects of the workflow. The realistic rendering improves pre-print verification, advanced multi-material opens new creative possibilities, Orca Cloud simplifies profile management across multiple machines.

If you frequently use multi-material, the per-feature assignment is a sufficient reason to upgrade. If you work on multiple computers or manage several printers, Orca Cloud eliminates many manual steps. If you have modern firmware with input shaping, the integrated configuration simplifies the setup.

Even for those who print mainly in single material, the improved rendering and bridging optimizations make the experience smoother. The Troubleshoot Center helps solve common problems without searching for external documentation.

The update from 2.3 is recommended for most users. The new features are optional: those who prefer the traditional workflow can continue to use it, still benefiting from bug fixes and performance optimizations.

article written with the help of artificial intelligence systems