CGI Pecs

I've recently seen a trailer for the forthcoming film "300" about Sparta's little handbags at 10 paces spat with Persia, two or three millenia back (more three than two, I reckon).

Now I know that the film relies heavily on CGI for much of its look. What I don't know is whether this extends to the physiques of the leading actors. Most of them look like they've been given a specially molded stick-on six packs. For example:-


Anyway, I might have to get Doug to take me along to see this film when its released so I can get a closer/longer look. Purely for research purposes you understand :-)