I have a real image and I need to generate a synthetic image that is very similar in term of shape (I do not need to be very detailed). I am wondering how someone can do this using makehuman and blender. The background is not important. I want just to synthesize the person. Here is an example.
Here is a basic answer for such a broad question...
Since you say detail doesn't quite matter, you may find something like this interesting. for this approach I used meta spheres, and then converted it over to a mesh.
Just so I steer clear of any trouble, here are is my source of the image used: Pixabay Image Reference
Here are the results, and the Blend File: