Using programs like Blender or 3D Object Converter, it should be quite possible to convert AC3D geometry files (*.ac) to 3D Studio Max graohucs (*.3ds).
Convert AC3D geometry data to 3ds Max (3D Studio MAX) graphics.
We have found 5 software records in our database eligible for .ac to .3ds file format conversion.
Microsoft Windows software - convert ac to 3ds on Windows
A very popular free program used for work with 3D graphics
Convert from ac file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ac to 3ds. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
3D viewer and converter with huge file type support
Apple macOS / Mac OS X software - convert ac to 3ds on OS X
The Mac version of popular free 3D graphics software
Linux/Unix software - convert ac to 3ds on Linux
Easy-to-use 3D modeling utility
On-line services software - convert ac to 3ds on web
A free online 3D model conversion service