The goal was to make isometric drawings for a company service map, which can be combined, colorized and animated later. All the elements of vector based drawings had to be exchangeable and separated. 

Sketching and pencil drawings were very important at this moment and it was crucial to develop and conceptualize the looks and functions. It wasn't a goal to make "realistic" drawings, but to draw fantastic and impossible machines. 

After the consultation the drawings were vectorized and finished as they are.