For all people that want to have fun to create virtual environments and homes in 3D recommend Google SketchUp, A 3D modeling software , developed for the design phases of the design. This software offers a set of tools that combine simplicity and robustness, simplify and optimize the 3D on your computer. The program is easy to learn , although it must still meet its instruments and its mode of operation , before starting work . In this case, just have a look at its on-line manual in Italian. Here you are some examples of projects created in 3D Google SketchUp.