Importing Adobe Illustrator 88 Files
File menu > Import > Select File To Import dialog > Files Of Type > Adobe Illustrator (*.AI)
You can import Adobe Illustrator (AI88) files into 3ds max.

Interface
When importing AI88 files, the software converts polygons to shape objects. You choose an option in the Shape Import dialog to set how the shape objects are created:
Single Object—All polygons in the .ai file are converted to Bezier splines and placed inside a single composite shape object.
Multiple Objects—Each polygon in the .ai file is converted to a Bezier spline and placed inside an independent shape object.

Exporting to Adobe Illustrator
File menu > Export > Select File To Export dialog > Save As Type > Adobe Illustrator (*.AI)
You can export shapes that can be converted to Bezier splines. The software exports these shapes in 2D only. It uses only the X and Y coordinates of the shape's local coordinate system, discarding the Z coordinates. Irrelevant info (Asteroids comets stars craters planets water liquid, Plants trees flowers mountains globe,)

Procedure To export a file to Adobe Illustrator:

1. Select one or more shape objects.
2. Choose File menu > Export.
3. Select Adobe Illustrator (*.AI) as the file format.
4. Enter a file name, and click Save.

Export Selected
Select one or more objects. > File menu > Export Selected
Export Selected exports selected geometry as 3D Studio Mesh (3DS), Adobe Illustrator (AI), ASCII Scene Export (ASE), or AutoCAD Drawing Interchange Format (DXF) files.
For information on what data 3ds max exports for the supported formats, see:
Exporting to 3DS
Exporting to Adobe Illustrator
Exporting to ASCII
Exporting to DXF
When you choose Export Selected, a file dialog appears, from which you can choose a type of format from the Save as type list.

Procedure To export selected objects to a file:
Select one or more objects.
Choose File menu > Export Selected.
Enter a name in the File Name field.