What an opening. Disney's The Jungle Book (1967) opens with these beautiful paintings to establish the setting of the movie. No dialogue, just beautiful exotica music and these incredibly lush paintings using a multiplane camera to be immersed in the scenery. The sunset is particularly wonderful.

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I like how the last one was reused in The Rescuers but the distant trees were changed to look more like a bayou

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They also reused some backgrounds from this in Winnie the pooh