 The latter method can produce a sharper image but some degree of deinterlacing would mostly be required to gain notable visual benefit.While the former method will produce horizontal artifacts towards the top and bottom of the picture due to the heads being unable to traverse exactly the same path along the tape surface as when recording on a moving tape, this misalignment would actually be worse with progressive recording.Interlacing can be exploited to produce 3D TV programming, especially with a CRT display and especially for color filtered glasses by transmitting the color keyed picture for each eye in the alternating fields.