Method, in a system comprising first means, second means and third means, for displaying to a user a second object associated with a first object of a 3D scene, wherein said first object is a real object and wherein said second object is a holographic object displayed by an holographic projector, said method comprising: determining, by said first means, of a location for displaying said second object, displaying, by said second means, said second object, wherein said second means comprises said holographic projector configured to display said second object at said determined location, and determining, by said third means, a position of said user, wherein said position of said user is said position of said user in the 3D scene, wherein the location for displaying said second object is determined by determining (120, 130, 140, 150) a position on a predetermined shape embedding said first object along at least one plane, according to a predetermined relative positioning information and said position of said user; said method further comprising - a step for retrieving, by said first means, said predetermined shape associated with said first object; - a step for calculating, by said first means, an intersection between said predetermined shape and an imaginary line joining a center of said first object and said position of the user; - a step for retrieving, by said first means, said predetermined relative positioning information; and - a step for determining, by said first means, said position of said second object by applying said predetermined relative positioning information, to said intersection. determining, by said first means, of a location for displaying said second object, displaying, by said second means, said second object, wherein said second means comprises said holographic projector configured to display said second object at said determined location, and determining, by said third means, a position of said user, wherein said position of said user is said position of said user in the 3D scene, wherein the location for displaying said second object is determined by determining (120, 130, 140, 150) a position on a predetermined shape embedding said first object along at least one plane, according to a predetermined relative positioning information and said position of said user; said method further comprising - a step for retrieving, by said first means, said predetermined shape associated with said first object; - a step for calculating, by said first means, an intersection between said predetermined shape and an imaginary line joining a center of said first object and said position of the user; - a step for retrieving, by said first means, said predetermined relative positioning information; and - a step for determining, by said first means, said position of said second object by applying said predetermined relative positioning information, to said intersection. - a step for retrieving, by said first means, said predetermined shape associated with said first object; - a step for calculating, by said first means, an intersection between said predetermined shape and an imaginary line joining a center of said first object and said position of the user; - a step for retrieving, by said first means, said predetermined relative positioning information; and - a step for determining, by said first means, said position of said second object by applying said predetermined relative positioning information, to said intersection.