A mode-selectable multiview display comprising: a mode-selectable backlight comprising: a light guide configured to guide light as guided light; a first directional scattering feature configured to provide first emitted light: from the guided light having a first propagation direction within the light guide according to a diffuse or unidirectional scattering pattern during a first operational mode; and a second directional scattering feature configured to provide second emitted light (102") from the guided light having a second propagation direction (103") within the light guide, different from the first propagation direction during a second operational mode, the second emitted light (102") comprising a plurality of directional light beams having different principal angular directions from one another, the mode-selectable multiview display further comprising: an array of light valves configured to modulate light emitted by the mode-selectable backlight as a displayed image, wherein during the first mode the array of light valves is configured to modulate the first emitted light and during the second operational mode the array of light valves is configured to modulate the second emitted light (102") a set of light valves of the array corresponding to a multiview pixel of the multiview display during the second operational mode, such that, during the first mode, the displayed image corresponds to a two-dimensional image and, during the second mode, the displayed image corresponds to a multiview image, the different principal angular directions corresponding to different view directions of views of the multiview image. a mode-selectable backlight comprising: a light guide configured to guide light as guided light; a first directional scattering feature configured to provide first emitted light: from the guided light having a first propagation direction within the light guide according to a diffuse or unidirectional scattering pattern during a first operational mode; and a second directional scattering feature configured to provide second emitted light (102") from the guided light having a second propagation direction (103") within the light guide, different from the first propagation direction during a second operational mode, the second emitted light (102") comprising a plurality of directional light beams having different principal angular directions from one another, a light guide configured to guide light as guided light; a first directional scattering feature configured to provide first emitted light: from the guided light having a first propagation direction within the light guide according to a diffuse or unidirectional scattering pattern during a first operational mode; and a second directional scattering feature configured to provide second emitted light (102") from the guided light having a second propagation direction (103") within the light guide, different from the first propagation direction during a second operational mode, the second emitted light (102") comprising a plurality of directional light beams having different principal angular directions from one another, the mode-selectable multiview display further comprising: an array of light valves configured to modulate light emitted by the mode-selectable backlight as a displayed image, wherein during the first mode the array of light valves is configured to modulate the first emitted light and during the second operational mode the array of light valves is configured to modulate the second emitted light (102") a set of light valves of the array corresponding to a multiview pixel of the multiview display during the second operational mode, such that, during the first mode, the displayed image corresponds to a two-dimensional image and, during the second mode, the displayed image corresponds to a multiview image, the different principal angular directions corresponding to different view directions of views of the multiview image. an array of light valves configured to modulate light emitted by the mode-selectable backlight as a displayed image, wherein during the first mode the array of light valves is configured to modulate the first emitted light and during the second operational mode the array of light valves is configured to modulate the second emitted light (102") a set of light valves of the array corresponding to a multiview pixel of the multiview display during the second operational mode, such that, during the first mode, the displayed image corresponds to a two-dimensional image and, during the second mode, the displayed image corresponds to a multiview image, the different principal angular directions corresponding to different view directions of views of the multiview image.