1. A method of 3D imaging implemented in an apparatus that includes a stereoscopic or other type of multi-view imaging system, said method comprising: capturing multi-view image data for a field of view of the multi-view imaging system; evaluating the multi-view image data to identify any regions in the field of view lacking sufficient texture for determining corresponding 3D range data, which regions are regarded as low-texture regions; in the case that one or more low-texture regions are identified, generating output data or signals to control a texture tool or to guide a user controlling the texture tool, to project synthetic texture into the one or more low-texture regions; capturing multi-view image data at least for the one or more low-texture regions while illuminated with the synthetic texture; and determining whether sufficient texture has been provided for 3D ranging of the low-texture regions and, if so, updating the corresponding 3D range data for the low-texture regions.