It seems that mot to 3ds conversion is possible and represents transformation of data from LightWave motion files (.mot) to 3ds Max graphics (.3ds). This should be doable with Blender and perhaps also other 3D modeling tools and dedicated converters.
Convert LightWave motion file to 3ds Max (3D Studio MAX) graphics.
We found 2 software records in the database related to .mot to .3ds file format conversion.
Microsoft Windows software - convert mot to 3ds on Windows
A very popular free program used for work with 3D graphics
Convert from mot 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 mot 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.
On-line services software - convert mot to 3ds on web
A free online 3D model conversion service