While visiting my parents last week-end I found a couple of hundreds of Atari ST floppies. I didn't have time to sort through them, but one of them was readable from a PC drive so here it is.
No source code unfortunately, but a couple of prototypes of the 4 bitplanes fullscreen distortion from the Transbeauce2 screen. I liked this screen because the technique behind it is not "in your face".
I'll post more when I get the whole collection back, in a couple of months.