so if trial version of this software expired, what free 3d software can i use?
ANd where can i download it. thanks for your advice.
I already mentioned it twice: Blender, Wings3d, Truespace:
http://www.wings3d.com/http://www.blender.org/download/get-blender/http://www.caligari.com/downloads.htmlBut why do you want to learn a trial and switch later to another tool? This makes not much sense because the buttons, interfaces and functions differ a lot.