1. One or more computer storage media storing instructions that are executable by a processing device, and upon such execution cause the processing device to perform operations comprising: receiving a selection of an object item in a three-dimensional display environment, the three-dimensional display environment having multiple walls perpendicular to each other, the object item being associated with an executable object and having a first appearance of being attached to a wall of the three-dimensional display environment; in response to the selection, moving the object item away from the wall to a foreground of the three-dimensional display environment, such that the object item has a second appearance of not being attached to any wall of the multiple walls, wherein during movement of the object item, the object item is scaled in size through a plurality of intermediate successive transitioning states; and when the scaled object item reaches a threshold, replacing the object item using an instance of the executable object wherein the scaling is completed with the instance of the executable object.