Monthly performance summary for 2025-10 focusing on the Cura and CuraEngine repositories. The month delivered UX and performance improvements to the painting workflow, multi-material capabilities, build reliability, and code quality across Cura and CuraEngine. It also included targeted changes for localization, terminology standardization, and versioning, ensuring smoother releases (5.12) and deprecation of outdated printers. The work enhances model fidelity, reduces painting iteration time, and strengthens cross-repo consistency for future upgrades and releases.

September 2025 monthly summary for Ultimaker/CuraEngine and Ultimaker/Cura focusing on business value, robustness, and performance. Key deliverables span mesh robustness, rendering and painting improvements, multi-material workflow enhancements, and code quality. Notable consolidation of dependencies and simplification of the build, plus stabilizing tests and UI improvements.

August 2025 performance snapshot focused on stabilizing and elevating the painting workflow and expanding multi-material capabilities across Cura and CuraEngine. Key work delivered includes rendering stability improvements for painting (CuraRenderer integration) and a robust, cross-session painting experience, the addition of persistent painting tool settings and material color integration, a comprehensive Undo/Redo system for paint strokes, and higher fidelity multi-material rendering defaults. Additionally, mesh processing performance and stability were enhanced in CuraEngine with extended multi-extruder support and determinism fixes, contributing to faster previews and reliable builds across complex models.

July 2025 performance highlights for Ultimaker CuraEngine and Cura focused on debugging capabilities, geometry processing improvements, painting UX, and packaging stability. Delivered robust OBJ debugging export, texture-driven seam placement with corrected UVs, voxel-based initialization for mesh workflows, and a refactor of mesh material splitting for correctness and parallel performance. Added UV mapping enhancements and improved painting-on-material UX to reduce user friction and crashes. Strengthened cross-platform stability through packaging workflow improvements and macOS build fixes, enabling faster iteration and more reliable delivery.

2025-06 Monthly Summary — Delivered significant cross-repo improvements in Cura and CuraEngine focused on texture workflows, painting capabilities, and G-code generation. These efforts increased asset portability and fidelity, reduced manual rework for artists, improved UI clarity, and enhanced build stability. Key capabilities were delivered across two repositories: (1) Cura enabling advanced texture handling and painting enhancements, (2) CuraEngine improving mesh processing, G-code generation, and interop stability. The work reflects a strong blend of product value and technical execution, with an emphasis on end-to-end texture workflows, reliable printing, and robust testing.

May 2025 performance summary: Delivered significant improvements in mesh import, segmentation workflows, and toolpath optimization across CuraEngine and Cura. Achievements include texture-aware OBJ/UV loading, watershed- and voxel-based mesh splitting with multi-material painting, and enhanced path planning along with explicit retraction handling. Also stabilized CI, expanded multi-material painting capabilities, and improved 3MF/UV handling and travel visualization for better texture fidelity and user experience. Strong focus on business value through improved print quality, reliability, and extended material workflows.

April 2025 focused on expanding hardware support, stabilizing critical workflows, and accelerating end-to-end print configuration capabilities for Ultimaker Cura and CuraEngine. Key progress includes foundational X1/A1 support (definitions, profiles, and branding), enhanced multi-color capabilities, and robust import/export workflows (3MF) that streamline project preservation and interoperability. Critical fixes improved reliability in bed leveling, extruder handling, and exporter stability, directly reducing field defects and support escalations. The month also delivered refined build plate constraints, global printer definitions, and default patterns (gyroid) to boost print quality and consistency across printers and materials. Overall, the team delivered tangible business value by enabling broader hardware support, faster setup, and higher-quality prints while modernizing dependencies and tooling.

Month: 2025-03 — Monthly summary for development work across Ultimaker/CuraEngine and Ultimaker/Cura. Focus: deliver business value through reliable builds, improved rendering, performance, and user experience, while strengthening code quality and security.

February 2025 focused on stabilizing travel behavior, expanding cross-repo capabilities, and strengthening packaging, documentation, and testing for a smoother release cycle. Key feature delivered: travel retraction and priming handling during travel in CuraEngine with multi-segment travel, retraction limits, z-hop interaction, and conditional retract disabling for printers that manage retraction. Major bug fixes included: restoring missing extrusions with flooring_extruder_nr and fixing the missing outer line on bottom surfaces in CuraEngine; uninitialized split position bug fix in multiple code paths. Quality and standards improvements encompassed: anti-oozing unit tests, code optimization and clarity improvements, expanded documentation, and complete typing. Release and packaging enhancements covered: package naming updates, Conan version bumps, and overall version adjustments to support new release artifacts, along with related dependency fixes. Cross-repo enhancements in Cura added broader printer/HW support and tooling improvements (Sketch extruder name mappings, flooring extruder settings, dynamic class definition refinement, OS-aware packaging, licensing/UTF-8 handling, and enhanced workflow strategies).

January 2025 performance summary: Delivered cross-repo features and quality improvements across Ultimaker/Cura and Ultimaker/CuraEngine, focusing on interoperability, print quality, packaging reliability, and performance. Key outcomes include expanded hardware compatibility (Makerbot Replicator+), stronger control over overhang quality, flooring/roofing integration, packaging fix for macOS, and optimized overhang speed handling for faster, more predictable slicing.

December 2024 delivered meaningful feature work, packaging reliability improvements, and CI/CD automation enhancements across Ultimaker/Cura and Ultimaker/CuraEngine. The month emphasized business value and technical robustness: clearer visibility into command execution, safer packaging and dependency management, automated nightly builds with secure secret propagation, enhanced print-quality features, and cross-platform build stability. This set of changes reduces install friction, lowers release risk, and improves developer productivity while advancing product quality.

November 2024 monthly performance summary for Ultimaker CuraEngine and Ultimaker Cura. Focused on stabilizing core printing behavior, improving reliability of wipe moves, and accelerating release readiness through CI/CD and packaging improvements. Delivered concrete quality improvements that reduce prints defects and downstream support while expanding observability and maintainability.

In 2024-10, Ultimaker/CuraEngine delivered robust extrusion command handling improvements and a related refactor that enhances reliability and maintainability of extrusion paths. The work fixed a Z-offset zero bug and reduced complexity in path generation, contributing to more consistent print quality. Key outcomes include structural refactors in LayerPlan, a new extrusion segment function type alias, removal of an unused parameter, and a targeted fix to extrusion command generation using writeExtrusionRelativeZ.