I made a an old intro (never completed and rather basic), that had highres/laced in the top portion of the screen with some palette sliced images (black and 15 colours per line), and lowres/laced in the bottom with a sinus scroller. The pics looked pretty good considering. I think I used ham-lab or something to convert the images with dithering etc. It could also output PCHG format (
http://aminet.net/package/dev/misc/PCHGLib14) for apps that supported that.
