Hi Zim3000x, it's difficult to create sculpted type organic details in a CAD program like MoI - something like ZBrush or 3D coat or mudbox like you also mention would be your best bet. You can use .obj format to transfer from MoI into those formats. When you do the export make sure your mesh is fairly finely decimated into small pieces by using the "Divide larger than" option at export time as shown in these examples:

http://moi3d.com/forum/index.php?webtag=MOI&msg=804.26
http://moi3d.com/forum/index.php?webtag=MOI&msg=2833.5

- Michael