How can I use my own reference material only without Firefly using outside resources to generate?

How can I use my own reference material only without Firefly using outside resources to generate images?

 I tried using two of my images a charcoal drawing that I created, plus an oil painting that I did, two of the images came out as two different Star Trek actors, Chris Pine and Brent Spiner so I know it took other images and added them to the mix, that's unacceptable.