And acquire a head begin with the 3D Warehouse, which is filled with pre-designed products of well known structures and common objects. Trimble SketchUp (Previously Google Sketchup) is computer software you can use to make, modify and share 3D versions and is an easy to learn 3D modeling program. SketchUp http://sketchuptraining38158.blog5.net/10508831/sketchup-training-for-dummies