CompuServe Messages

Glenn, There's not actually a step that _divides_ a frame into fields. Your TV just does this automatically when it projects an image. The fact that every other line is drawn is hardware dependent on the device. What you are doing when rendering to fields is _taking advantage_ of the fact that TV is crappy and interlaced and making your images look even better than they otherwise would. A frame of video is a frame of video. It _always_ contains two fields. Whether or not you take advantage of this is up to you. You don't have to render to 486 lines. The PAR, for instance requires a 752×480 image. It still outputs a valid NTSC signal though, it takes care of all of that internally. Basically, though, the PAR is not a legal NTSC device though that issue would only come up for someone like Jim Murphy. Inside joke. Let me know if you still don't fully understand, though I think I've exhausted my knowldege on fields. Take care. DM