The DesignerDojo folks (Hi Paul) go on about how good SketchUp (formerly Google SketchUp) is for making 3D shapes, and for building, say, houses.
I've stumbled across Make Weird Stuff in Unity. In short, design in SketchUp, then import in to Unity, where it can be sued as the basis for a simple walk-through, or for use in a game.
Oh, Designer Dojo have been slowly turning Cork City Centre in to a SketchUp model… Racing game for the Grand Parade circuit (with a short-cut through Oliver Plunkett), or a gripping brawler in front of the Court House on Washington Street. Or Cops and Robbers battle for a shooter via Battlefield:Hardline.
Decisions, decisions, decisions.
Of course I'll need to learn how to use SketchUp and Unity properly first.?
Make Weird Stuff in Unity Tutorial
An in depth hands on way of making cool looking stuff in Unity super quickly with no programming