Hey Thura,
Just saw your thread here, remind me to answers your questions you send me some time ago, (sorry didn't find the time at this moment..-
But I have here a link which may be answer all of your questions:
http://www.123dview.com/blog/
Truly hope you find the wright answer, just one thing I want to say, if your dream is, becoming a "good" CG artist, practise, practise, be good do good! Follow your dream!
Cheers
Patric