It began with a sketch in 2018
I did the initial design on my iPad with Procreate, and used that to build a 3D model in Solidworks. I went back and forth between 2D and 3D design tools since CAD can be quite rigid to use for testing new ideas.
The Visual Pinball Engine project was just getting off the ground, and at the time the dev team was targeting a web player (instead of Unity, their current platform). I was able to create a rough table through Visual Pinball X and import into the Visual Pinball Engine framework, allowing me to play it on my iPhone!
I had previously started building a Factory themed pinball machine back in 2015, but didn’t like the direction it was going. I taped up the playfield from that project and used it to lay out Gravity’s initial design with foam board and tape.