Sketchup
If you are an artist, engineer, architect or an aspiring one, then you might have heard of Google Sketchup. The program is free to download for home use and definitely very helpful when it comes to learning how to render various objects and structures needed for your particular course.
With this helpful program, it's much easier to practice and learn 3D rendering and modelling. Pretty much, it can help you create houses, decks, rooms, floorplans or other objects in 3D. It's certainly an easy and free way to find out whether creating 3D models is perfect for you.
The program is offered absolutely free but also has a Premium version. It contains plenty of features and is simple to use that almost any novice can master the program.