Evaluate the valence intensity of the following sentence, considering the mental state of the author. Present a score between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Sentence: With Danilo Donati 's witty designs and Dante Spinotti 's luscious cinematography , this might have made a decent children 's movie -- if only Benigni had n't insisted on casting himself in the title role .