I just discovered a forgotten file folder with all these preliminary drawings for my painting of Giganotosaurus.
These are all separate attempts to work out the pose and the lighting. I drew the same scene again and again until my head hurt.
In the lower right, I photocopied one of the drawings, glued the copy down on board with matte medium, and then painted a color sketch over it in oil. Some of the drawings have notes on them because I intended them to help the art director to plan the exact layout. I sent others to paleontologists to solicit their expert input.
With scientific illustration, you can't just dive in and paint; it's necessary to get sign-offs at various stages. By the time I transferred the drawing to the board and started painting, I had solved all the basic problems, and I was ready to think about colors and textures.
For more on painting dinosaurs, check out my three dino DVDs, which you can get directly from the manufacturer Kunaki at this link:
They're also available on Amazon:
Tyrannosaurs: Behind the Art
How I Paint Dinosaurs
Australia's Age of Dinosaurs: The Art of the Postage Stamps
or, if you prefer downloads, get the latest video, "Tyrannosaurs: Behind the Art" as an HD download.