Where did Art Director Douglas Rogers visit for inspiration for Shrek 's swamp ?
Since he 's an ogre , Shrek has a considerable amount of physical strength , being able to break wood and metal constructs , get in physical combat with a number of armored humans and usually winning , unintentionally destroying a wooden vessel with a bottle of wine , and even lifting or turning objects that are too heavy for a normal human being , such as a gigantic vat of magic potion against the maximum security of the Fairy Godmother in " Shrek 2 " .