His brother is dead? I think you're thinking of the sequel with Vincent Price, The Invisible Man Returns.

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SPOILERS
It's true.the Invisible Man is invisible as soon as the film begins and he's a huge dick right as it starts too. Which goes against that whole idea of having a sympathetic main character. I suppose the film appeals to our mischievous sides. It's great.
Revealing Griffins face for the first time as he dies is an effect that literature can't capture in the same way. He is humanized (both physically and emotionally/mentally) for the first time in death. It's really effective.

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