k, posted three more scanline shots up that (cunningly enough) match the three situations you suggested
Incidentally, with scanlines on, filtering really isn't needed on the backgrounds (ok, no surprise) - but in the sense that you really can't tell the difference at all. Having it on hardly changes it at all. It's images with sharp edges (like the font) where filtering is *really* noticable, even with scanlines on.
50% scanlines do look a lot better than full ones though; again, I suppose no surprises there.
Another update: I've added scanlines in as an option configurable from the console. So, while you're in game, you can change scanlines to any level of transparency (and turn them off, of course).
Incidentally, scanlines *do* slow the engine down. Nothing to be done about that ... it'd just be a cosmetic setting, if you wanted them on. Didn't take too long to do, I suppose, so I might as well have it in though.
[edited] 68 2001-11-02 01:14