Create a rough blockout of your design, starting with the most basic shapes possible. Be careful not to over-detail your blockout, because the main objective here is to be able to easily change your design while you’re still in the early stages of the process.

Refine your blockout as much as possible by slowly adding in details. If you have trouble thinking of details for a certain area, you can screenshot your model and sketch over the image in 2D. Breakout sketches like this will give you a better plan for how to add your details in 3D.

Continue adding more details until your model is in a good place, and is mostly finished. You can also add pipes, cables and internal parts at this stage. Finally, take a step back and review your design overall. There will be another chance to make changes before moving into materials in the next lesson.