3D graphics saved in 3D Studio Max format (.max) probably can be converted to polygon only graphics (.ply) either with the original software or with some kind of alternative, 3rd party solution or dedicated converter. Often used for the use on 3D scanners / printers.
Convert 3ds Max (3D Studio MAX) scene to Polygon graphics.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert max to ply on Windows
A 3D CAD translation softwate
Convert from max file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.