A light source module , comprising: a segmented light diffusing material comprising a plurality of segments , wherein at least some of the segments have different light diffusing properties than other ones of the segments due to differences in surface finishes of the segments or due to fixed material differences in respective materials of the segments; and an illumination array comprising a plurality of illumination elements , wherein separate sets of illumination elements each comprising one or more illumination elements correspond with separate ones of the segments of the segmented light diffusing material; wherein the light source module is configured to be embedded in a mobile computing device and is further configured to: receive one or more control signals for adjusting an amount of diffusion for light emitted from the light source module; and selectively illuminate one or more sets of the separate sets of illumination elements, in response to receiving the one or more control signals, wherein light emitted from a first set of illumination elements passing through a corresponding first segment of the segmented light diffusing material is diffused a different amount than light emitted from another set of illumination elements passing through another corresponding segment of the segmented light diffusing material. a segmented light diffusing material comprising a plurality of segments , wherein at least some of the segments have different light diffusing properties than other ones of the segments due to differences in surface finishes of the segments or due to fixed material differences in respective materials of the segments; and an illumination array comprising a plurality of illumination elements , wherein separate sets of illumination elements each comprising one or more illumination elements correspond with separate ones of the segments of the segmented light diffusing material; wherein the light source module is configured to be embedded in a mobile computing device and is further configured to: receive one or more control signals for adjusting an amount of diffusion for light emitted from the light source module; and selectively illuminate one or more sets of the separate sets of illumination elements, in response to receiving the one or more control signals, wherein light emitted from a first set of illumination elements passing through a corresponding first segment of the segmented light diffusing material is diffused a different amount than light emitted from another set of illumination elements passing through another corresponding segment of the segmented light diffusing material. receive one or more control signals for adjusting an amount of diffusion for light emitted from the light source module; and selectively illuminate one or more sets of the separate sets of illumination elements, in response to receiving the one or more control signals, wherein light emitted from a first set of illumination elements passing through a corresponding first segment of the segmented light diffusing material is diffused a different amount than light emitted from another set of illumination elements passing through another corresponding segment of the segmented light diffusing material. <EOS>