Csupó explained that `` it was a very conscious decision from the very beginning that we 're not going to overdo the visual effects because of the story 's integrity and the book 's integrity '' , because there was only a brief mention of Jess and Leslie fighting imaginary creatures in the forest in the novel .
Csupó explained that `` it was a very conscious decision from the very beginning that we 're not going to overdo the visual effects because of the story 's integrity and the book 's integrity . ''