Hot answers tagged piece-information
A cheese slope resembles a chunk of cheese from a cheese wheel. They happen to also be the perfect size for minifigures to interact with: ‘Lego Cheese Farm’ by AIatariel, http://www.flickr.com/photos/alatariel1181/10582728886/
It looks like it could be either #3049 or #3049c. Part #3049 currently exists in Sand Blue in at least three sets. As for the change in smooth and rough texture you may wish to read this answer by Joubarc.
As was mentioned in another answer, the cheese slope looks like a slice of cheese at around minifigure scale. This part has also actually been used as cheese in official sets, including Medieval Market Village:
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