My first sketch was drawn in Procreate on the iPad, and was approved straight away.
I then imported that into Manga Studio and started adding layers of photo ref, screen-grabbed from a dvd of the movie along with a photo of my legs to add to the main figure...
A tight pencil drawing was then done over that on a new layer...
Then I added a layer of rough airbrush colours, along with a scan of some real paper textures...
And then the rest...