Grading Optimization for Civil 3D 2022.3 Update

May 24, 2022 – Autodesk releases Autodesk Grading Optimization for Civil 3D 2022.3 Update

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The Autodesk Grading Optimization for Civil 3D 2022.3 Update is available via the Autodesk Desktop App or via download from the Autodesk subscription site.

The install requires access to the original install resources.

The official release date of this build is May 24, 2022.

Grading Optimization for Civil 3D 2022.3 Update

Autodesk Grading Optimization (GO) is an interactive tool that facilitates grading various land areas. GO consists of optimization algorithms that work toward surface smoothness while accommodating user-imposed constraints. These design constraints include grading and drainage elements.

GO requires access to an Autodesk AEC Collection license.

This GO update includes fixes to the Grading Optimization for Civil 3D 2022 Update releases.

Fixed Issues

Interoperability Workflows

  • Fixed an issue in which "Failed to start Grading Optimization" displayed at the command line and Grading Optimization opened with an empty canvas. This occurred due to the background resources creating long file names and paths for files in the Windows temporary files folder.
  • Fixed a stability issue when attempting to return optimized grading data to a read-only Civil 3D drawing. A warning message now displays when launching Grading Optimization from a read-only drawing.
  • Added a warning message to display when feature lines being returned to the Civil 3D drawing overlap existing feature lines in a selected site.


  • Fixed a stability issue caused by adjacent drain lines when optimizing a model.
  • Improved performance by limiting an optimization to ignore points outside of a Grading Limit.

User Interface: Civil 3D

  • Fixed an issue in which Civil 3D palette tools had errors after reset settings on a computer with Grading Optimization installed.

User Interface: Grading Optimization

  • Fixed text truncation issues that occurred on the Grading Objects browser and Properties panel in localized versions of Grading Optimization.
  • Fixed an issue in which causing tooltips were hidden behind the properties panel.
  • Fixed an issue causing the Minimum Drain Inclination (formerly Minimum Zone Inclination) to not specify drain direction when no drain lines or low points were present in the model. The Minimum Drain Inclination now sets the direction vectors and the Minimum Drain Slope direction within a zone.
  • Improved the graphical picker for the inclination direction tool by adding prompts to provide clear instruction to set the direction.
  • Improved the Grading Object Properties Panels (formerly the Grading Object Properties dialogs) by logically listing minimum constraints first and then maximum constraints.
  • Added the ability to collapse sections of the Visualization Settings dialog box

See the Known Issues list

Read the Grading Optimization for Civil 3D 2022.3 Release Notes in the help