This Script imports multiple Illustrator files in one click, it attaches splines and weld vertices. you can add an extrude modifier by Shift Clicking the button.
Make sure to save your .ai files to illustrator 8 as 3dsmax can't import more recent version of illustrator files.
Install by drag and dropping in the viewport, then go to customize, customize user interface, tool bar, category "SimonScripts", create a new toolbar if you haven't got one already, then drag "Import AI" inside the toolbar.
Update 1.1: Shift+click is no longer needed for importing multiple files, you can now select multiple files directly in the browser, i've also added a renaming based on the file names.
Update 1.2: bug fixed, if two files where loaded they where not evently spaced.
Update 1.3: bug fixed, script was crashing when file wasn't saved as illustrator version 8, it still can't import it but it send a message instead of crashing.
Update 1.4: added .dxf support, the extrude modifier is no longer added by default, you need to shift+click the button to have the extrude modifier added to your imported splines.
Update 1.5 : added .dwg support
Update 1.6 : added .svg support for 3ds Max 2025.2, i kept the settings dialog pop up for the first selected file, there is some interesting import settings, it will use the same settings for other imported files.