I apologize for my English is not my native language.
I am a new user to your Unity3D (Free), and I know that in the Pro version can create multiplayer games, now as I would like to try the most Unity3D Free I understand this thing:
With Free Unity3D can create games online? What if I can use (client-server, master server, etc. …) ?
I may be wrong, but I don’t think there are any pro-only features in Unity’s networking support. Unless someone posts here to confirm/deny that, though, you might try asking in the dedicated Multiplayer Networking forum.
I also tried unity3D 2.6, and the terrain editor gave me no problems, was fine, while Unity3D 3.1 is not smooth at all, and freezes frequently, I have to do some 'at a time.
It’s absurd that people should feel a need to apologize for their English, unless they’re native speakers with no language ability. This is a very international forum and few people are going to give you grief over English writing skills and if they do, they are losers anyway.