I am working on a medical imaging project and I would like to put a male model that is true to size in to test the feasibility of the device like the two pictures show but ones with legs closed (parallel) are preferred since they will be lying on the bed.
I loaded DAZ Studio. It is a free highly sophisticated app that does well for posing a person including scaling.
Once you have a model posed, you can export these as .obj files. This should import as a facet file without issue.