GeoStudio | PLAXIS - PLAXIS 3D 2026.1 Release Notes

New in PLAXIS 3D 2026.1

Release: October 2026

PLAXIS 3D 2026.1 (26.1.0.211) contains the following improvements and updates compared to PLAXIS 3D 2025.1:

New features

New default embedded beam behaviour with Interaction Surface
A new default formulation for the embedded beam is introduced called “Interaction surface” that offers several numerical improvements, like less mesh sensitive results, a more realistic load transfer mechanism and smoother skin-traction profiles. This new default behaviour supersedes the line based embedded beam behaviour of 2025.1.3 and earlier. Note that the line based embedded beam is still available and can be selected by choosing the option ”Interaction line (legacy)” when selecting the new Interaction model property for the embedded beam material set. Projects from previous versions opened in 3D 2026.1 will be converted and will retain the legacy embedded beam behaviour. Newly created embedded beam material sets are automatically created with the Interaction model property set to “Interaction Surface”.

Cloud Interoperability: PLAXIS & GeoStudio - Tech Preview
Seequent Evo enables cloud-based interoperability between PLAXIS and GeoStudio, allowing teams to share 3D geometry with material name and colours. By reducing manual data recreation and improving consistency across geotechnical models, engineers can streamline workflows, enhance collaboration, and work more efficiently within a connected digital ecosystem.

This feature is released as a 'Tech Preview' under our Product Terms and requires access to Seequent Evo.

Georeferencing in PLAXIS 3D - Tech Preview
PLAXIS 3D now allows users to define the real-world location and orientation of a 3D model while continuing to perform analyses in local coordinates for optimal numerical accuracy. This enables seamless participation in geospatially referenced workflows and improves alignment with data shared through Seequent Evo, helping teams maintain both model accuracy and real-world positioning without complex coordinate transformations.

This feature is released as a 'Tech Preview' under our Product Terms and primarily supports Evo-enabled workflows.

Other changes and improvements

SOLVED Known issue: When using multiple User Defined Soil Models in one phase it again possible to inspect the contour plots of any state parameters. [more info]
The Help menu has been restructured and has new options pointing users to useful information like verifications and learning content like Learning Path, practical cases etc.

Compatibility note: To ensure there is no data loss in the original project and properly converting modified project properties, when opening older projects, they will be converted and saved with a _converted suffix. Specifically when opening projects older than the 2025.1 version, due to major changes in the calculation input and results database, the projects require remeshing and recalculation.
Side-by-side installation with a previously released major version of PLAXIS is supported (e.g., PLAXIS 2025.1.x and PLAXIS 2024.3.x), enabling a smooth transition to the new version without impacting ongoing projects.
Be aware that earlier versions of PLAXIS will not be able to open files saved in PLAXIS 3D 2026.1.

Fixed issues

A large number of issues have been addressed, including:

[377841] You can now configure your company logo in PLAXIS using native commands or Python scripting.
[378745] The default Output plot configuration is now set to "PhaseBehaviour" to ensure consistency between on-screen visualizations and exported content.
[379554] Resolved an inconsistency where user-defined object names differed between Input and Output.
[379601] You can now configure all legend settings, such as applying a logarithmic scale, through the native command line and Python scripting.
[479639] Resolved an issue with tunnel advancement in Staged Construction.
[1198693] PLAXIS will provide a message about deprecated commands in the Python response for user awareness.
[1319302] Object names specified in Input are now correctly and consistently displayed in Output.
[1385503] Improved performance when collecting results for export to ParaView.
[1429154] Fixed an issue that prevented access to UDSM state parameter values in Output via commands and Python scripting.
[1434639] Corrected an issue with the selection of curve points for rigid bodies in Output.
[1511420] Dynamic load and displacement components are now shown only for dynamics-related phases in Staged Construction.
[1560088] Resolved an issue with the contraction configuration when extending a tunnel's trajectory.
[1624598] Fixed an issue that occurred when using the "Export to ParaView" option in Output.
[1634574] Fixed a visualization issue with structural elements in Staged Construction.
[1651688] The maximum pressure head value for the unsaturated zone (psi_unsat) is no longer controlled by the "Use default" checkbox.
[1671121] Design Approach information are now displayed in Calculation information per phase in PLAXIS Output
[1694595] The visibility icon in the Model Explorer now correctly indicates with a half-opened eye when a mix of objects is hidden and shown.
[1739808] Improved stability with unsupported use of PLAXIS with Parallels (Apple MacOS)
[1940335] Improved the mesher's performance with curved beam elements.
[1942215] Fixed an issue with the OCR1 state parameter result in Output of the Shansep NGI-ADP model.
[1943082] Pressing "Enter" now moves to the next field instead of exiting when providing input values in the Explorers.
[1952957] Resolved an issue that prevented results from opening in Output for a converted project.
[1956345] The phase order in Output now correctly matches the order in Input, including in native command and Python scripting.
[1983473] Fixed an issue to reduce the project file size when UDSM models are used, leading to general performance improvements.
[1992457] Improved the general performance of the mesher, resulting in faster mesh generation.
[1987203] The "Cyclic accumulation and optimisation" tool for the UDCAM-S model will now fetch the correct license information.
[2000081] Improved the visualization of external loads when the "Updated mesh" option is used.
[2005938] Fixed an issue where external water loads were displayed incorrectly on model boundaries.
[1993345] Resolved an issue that occurred when trying to rename the Phase ".Identification" property.
[2012672] Fixed an issue that occurred when viewing certain material sets that were in an invalid state.
[2020141] Fixed a visualization issue with the external water loads in PLAXIS Output.
[2019238] Improved performance when viewing table results of embedded beams in Output.
[2026115] Fixed an issue that caused void ratio-dependent permeability to reset when the "Reset displacements to zero" option was selected.
[2035944] The interface ".Area" property is now computed correctly in Output.
[2044363] Resolved a visualization issue with beam local axes for curved elements in Output.

Download links

You can update to the latest version using the CONNECTION Client or download the installer via Bentley System's Software downloads.