I started messing around in Blender with the THUG Pro plugins but never got far.
At the time I was working full time and came home exhausted almost everyday, didn't really feel like doing anything at all.
My most developed idea was a neighborhood level that consists of a cul-de-sac that exits into a normal neighborhood that has a park splitting between the houses. The road also inclines upwards to a haunted house on a hill that would be fully skateable inside. There would also be a graveyard behind the haunted house.
I would like to finish these ideas since I think they have merit, it would also be a good idea to actually learn Blender.
Download it here.
