"In her illustrations in Bilbo – en hobbits äventyr, Jansson concentrated on the landscapes, she was not as interested in the characters of the story.
She even made some of the characters especially tiny to elevate the landscapes.
The illustrations consisted more of her impression of the story than literal repetitions, which many Tolkien fans found unsatisfying.
According to them, Jansson overlooked many of the central characteristics of the characters.
...she edited the pictures many times to avoid them being too much like the Moomin illustrations.
However, the readers saw the illustrations as more Jansson like than truly Tolkien like."