Techniques are provided for controlling the selective filtering of display positioning information used to position holograms in mixed-reality (MR) scenes. A first and second environment are identified, the first is moving relative to the second. First and second display positioning information (i.e. “environmental data”), are obtained for the two environments. A determination is made that a hologram is to be placed at a fixed position relative to either one of the first or second environments. When the hologram is placed relative to the first environment, at least some of the second display positioning information is filtered from the environmental data. Alternatively, when the hologram is placed relative to the second environment, at least some of the first display positioning information is filtered.