Storing 3D model information into a 2D image using colored pixels as representation of x,y,z coordinates.
Each line of pixel is a "slice" of the 3D model, starting from the "top".
In the first days, the main question was how to use 2D filters and/or 2D tools to transform/edit/modify a 3D model in a "coherent" or "somewhat predictible" way.
So we went through an iteration of code and data model (2D representation) changes to try to achieve an acceptable solution to this experiment.