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- After doing the setup above, open a sample gds file with klayout, or create a simple gds file
- "Tools" menu - "gds3xtrude" - "Run Script"
- The In your AFS home directory is a folder name ".klayout" – this folder with the klayout gds3xtrude sample files may not be visible by default because the folder name begins with a dot: ".klayout" .
- In the File dialogue that opens, you can type in: .klayout (note the leading dot) and hit return... this will open the possibly hidden ".klayout" folder
- In that hidden ".klayout" folder, go into the subfolders: salt - gds3xtrude - example-scripts
- You will a sample named: freepdk45.layerstack
- Select that sample and click "Open"
- OpenSCAD now opens having extruded your gds file with gds3xtrude
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