The problem of 3D panel display systems either (a) requiring special glasses to separate left and right images, or (b) having auto-stereoscopic 3D with compromised fidelity, is solved by providing, for each of a plurality of left and right sub-pixels, both (1) means for separating the left and right image signals (e.g., alternating wedges, prisms, off-axis self-sourcing pixels, etc.), and (2) means for multiplexing the separated left and right signals to a plurality of users (e.g., gratings, such as amplitude gratings, phase gratings, etc.), such that (1) the left image is provided to a plurality of virtual volume apertures (VVAL) containing positions of the left eyes of the plurality of users, and (2) the right image is provided to a plurality of virtual volume apertures (VVAR) containing positions of the right eyes of the plurality of users. Glass-free 3D systems consistent with the present invention may treat far field optical signals from the display panel as electro-magnetic waves (and therefore treat diffraction and interference properties as significant, dominating far field optical distribution) rather than as rays consistent with geometric optical theory.