1. An object ( 1 ) comprising a region (R) of its surface suitable for showing a plurality of images such that each image is observable by a user from a different direction, wherein this flat region (R) comprises: a plurality of cavities ( 1. 1 ) in low relief regularly distributed on the surface of the region (R); each of the cavities ( 1. 1 ) shows a plurality of side facets ( 1. 1. 1 , 1. 1. 2 , 1. 1. 3 , 1. 1. 4 ), at least one facet per image, where each facet ( 1. 1. 1 , 1. 1. 2 , 1. 1. 3 , 1. 1. 4 ) is associated with either a first light level or a light level different from the first; the facets ( 1. 1. 1 , 1. 1. 2 , 1. 1. 3 , 1. 1. 4 ) which determine an image and are associated with the first light level have the same orientation and inclination with respect to the surface where the cavity ( 1. 1 ) is located; and this orientation is different from the orientation of the facets ( 1. 1. 1 , 1. 1. 2 , 1. 1. 3 , 1. 1. 4 ) of another different image.