I do all my renders in Max. Max has a number of different “Render engines” - my preferred one is Mental Ray which can produce production quality renders. There’s a huge learning curve in learning Max, but good news is there’s lots of resources out there. I like DigitalTutors.com best of all.
First off you have to export the models in FBX file format to be reimported into Max. You can export animation and morphs as well via FBX but it can be a little tricky. - Your best bet is to do it an object at a time.
Then in Max you’ll need to convert the standard materials to mental ray materials - I have a script if anyone’s interested in doing that.
As for skin you have to tackle mental ray fast skin subsurfance scattering materials.
After the objects are imported into Max and the materials converted to mental ray, then you can let mental ray do it’s ‘realistic’ magic.
Hope that helps.