I started off with doodles in a sketchbook to achieve an overall feel of what I wanted for my interior. I then took a few key sketches and further evolved those in virtual reality.
Next I went in to gravity sketch to rough in the basic volumes as well as place myself in the driver's and passenger's seat to make sure the concept accomplished that adrenaline-inducing emotion. After I was happy enough with the direction of my model. I then created a sketch and rendered it in photoshop to communicate my final execution.