A method that improves compensation for hard cuts andor vertical motion effects in the conversion of 2D images to 3D images, displays 2D images to one eye and computed images to the other eye. The dispenser comprises a housing having a support; a container, locatable within said housing, having an outlet, wherein said container dispenses through said outlet in response to movement of the container relative to the housing; and an actuation indicator having an indexing mechanism actuatable by movement of the container relative to the housing. The second portion is detachably combined with the first portion. The magnetic orientation in the sense layer rotates in response to an external magnetic field. The drawing field is identified and then the computer software is operated at least partly in reliance on the movement data, and in accordance with instructions associated with the drawing field. The mating patterns in the first and second layers result in a greater effective thickness in one of the layers in areas corresponding to a position where hips and shoulders of the user will rest on the mattress, and a lesser effective thickness in other areas.