At a neighbor's garage sale you find an old-time stereogram showing a posh group of people standing in front of the Eiffel Tower at center,and a zeppelin hovering in the background.How do the relative positions of the main objects change in the left- and right-eye pictures to achieve the 3-D effect?

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The Answer of At a neighbor's garage sale you find an old-time stereogram showing a posh group of people standing in front of the Eiffel Tower at center,and a zeppelin hovering in the background.How do the relative positions of the main objects change in the left- and right-eye pictures to achieve the 3-D effect?

At a Neighbor's Garage Sale You Find an Old-Time Stereogram