The pose comes from an image I found online.

In Photoshop, elements from other images are added and details are drawn in. I draw with the mouse.

Still in Photoshop, almost ready for the lines of the drawing to be selected and turned into a Path with the Paths tool.

In Illustrator, the image is now a collection of vectgor objects. It needs to be cleaned up.

 

The vector objects are assigned colors and waiting for vector gradients to be added.