The above image was created using a free model from
http://shapes.aim-at-shape.net/viewmodels.php
You can use these models to learn from and in some cases re-do(read the readmes on the site). In order to convert these models from their .off format(in some cases) to objects download for free
MeshLab at
http://meshlab.sourceforge.net
The files come tar zipped so you need Winzip to unzip them. You actually unzip twice (first the tar) then the zip.
Meshlab will allow you to import the files(some as high as 7 million polys) and convert them into.obj format ti import into ZBrush3
Their are 26 pages of models and the best ones are in the first few.
My picture above I can only credit the render which I did.
Its creator is
L.Saboret and M.Attene
I posted this as resource to obtain a few excellent models to study and lear from. Be sure to check out this site![attach=61233]freemodels_aim.jpg[/attach]