you don't know how many people ask this..........so, first get a modeling program(sketch up , blender, milkshape)
then you must script it(use notepad, also you should use other scripts as a refrence). then put it in a folder with a a discripton and a sever.cs and you are ready to go!(there are tutorials on how to do all of the stuff i mentioned so plz don't ask me to explain how to do stuff).
