AmbientShade :
I model the base mesh in C4D about 3000 polygones.
in zBrush rase polycount to around 4 million .
4 millions about my limmit or it slows down zBrush.
on a Windows 8 - 64 bit ,Quad core ,8 gig RAM,500 Gigs harddrive ,Geforce GT 620.

You can go much hier then 4 million with HD Geometry up to a Billion.
But I'm good with 4 million.
Don't know about a Billion in C4D.

Rokket :
I use C4D to model base meshes then detail with zBrush.
Basic polygone modeling with C4D ,Blender etc etc.
is all the same no matter what app you use.
Once you learn the basics ya can model anything.
Make some easy meshes to learn the basics.
a house ,table ,chair ,fireplace, fire hydrant.
look for good exsamples.

Keith :I liked the TV show.

Laylah : Game render engines are real time render engines.
0 render times. 
I've been waiting for real time render engines to get as good as are render engines.
any where from 1 minute to 3 hours render times.
Maybe one day.

Game looks good for a game thou.

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The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance