Some years ago the natural place for information exchange, showing jobs and solving doubts were 3d forums. Communities of viewers eager for knowledge that found other colleagues breaking their daily loneliness.
That meeting place has changed. Since the beginning of Facebook and its groups, the viewers find new places to share knowledge.
From my point of view the operation of the groups makes them the new 3d forums.
People find themselves comfortable on Facebook and they like to use it as a new meeting place. The 3d forums have not disappeared but, without any doubt, they have greatly reduced their activity because best architectural visualization facebook groups are the new forum.