Models and other 3D graphics from computer games can often be opened and edited using a 3D software like 3Ds Max. Sometimes requires special plugins, but lots of game resources are in standardized and supported formats.
Convert X3 Reunion ship file to Genesis3D actor file.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert bod to act on Windows
A widely-used 3D animation application from Autodesk
Convert from bod 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.