The Wolf Man

In Curt Siodmak's original script for the film, whether or not Lawrence Talbot really underwent a physical transformation to a werewolf or if the transformation simply occurred in his mind was left ambiguous. The Wolf Man was never to appear onscreen. Ultimately, the studio determined that Talbot's literal transformation into a werewolf would be more appealing to the audience and, thus, more profitable. The script was revised accordingly. The remake of the film starring Benicio Del Toro leaned into this idea, having its version of Lawrence Talbot be admitted to an asylum for "delusions" of lycanthropy.

Bela the Gypsy transforms into an actual wolf, not a wolf/man. When his body is discovered, his feet are bare but he is wearing a shirt and trousers. The wolf killed by Larry Talbot was not wearing any clothing.

Edited into The Wolfman (1966)