my english is bad, so, sorry

I use 3D Production Studio. There is a earth i can insert. My question is (yes, i have searched in forum first) How can i make a object round like this earth? maybe with "freeform". But when i look in the freeform of the earth, i can't see any changes from the 2D object. Also, how has Ulead make this world?
I hope anybody can understand my question

Thanks for help
Supeede