Screenshots of Resources

Here is the screenshot of Tony DiTerlizzi's front page blog:

It includes step-by-step records of making an illustration including his influences, reference pictures and choice of materials (which are mostly inks and watercolours).

There are also close-ups of his rough sketches that I find useful. In this image, DiTerlizzi shows the rough pencil sketch before any additional touches like inking or colour.

For his mermaid drawings, DiTerlizzi uses reference pictures of models to help with proportions and the reflective light on the subject underwater.

He posted comparisons between his pencil sketch and his inked works...

...and even finished and polished works which help me understand the processes of illustrating.

DiTerlizzi highlights the importance of using references to make the characters look convincing: