Drawing from memory and drawing from reference material results in pictures that are worlds apart. However much we think we can rely on our memories, this series of illustrations from artist Jack Stroud (aka Jackobo or PetrichorCrown on Twitter) shows how there's no substitute to studying a subject in detail.
Using a lioness as his subject, Stroud demonstrates how drawing from your memory can result in inaccurate drawings as the mind struggles to fill in the blanks of certain shapes and details.
He goes on to show how even a brief look at reference material can radically improve the standard of a drawing. In his final picture he resorts to 'eyeballing' or studying an image in depth. The finished result is a much more lifelike illustration that highlights the shortcomings of drawing without references.
In his Tweet, he writes: "I'm here to tell you the truth about referencing in art! IT ISN'T BAD. YOU CAN'T LEARN WITHOUT STUDYING."
Stroud's demonstration definitely proves this point, so be sure to use reference material in the future to enhance your own sketches.