Ok , you know i like demo ..
So i have decided to do nice texture wave demo, but this one split texture with drawing black line like a scanline.
Now if you take 2 texture and apply this fx one with every even line the other with odd line
you can make some interesting fx.
Inspired from Sodan and Magician 42 tech demo: done with (Amiga Copper chipset, when pc displayed 4 colors on 1987 )
https://youtu.be/mB5CujcTN8A?t=1m25s
Live example is here , so i can work on request.
http://gigatron3k.free.fr/html5/C2/FX/scopper