Here is one with a tonne of scanner noise, because I developed it in Diafine, then fix, bleach, and colour re-develop. (Astia)

Cant put the shadows up as the shadows start from zero density basically (lottsa scanner noise like a mobile phone cam in the dark from Epson's expensive top range of "amazing" and "professional" scanners :P).

Anyway, but to me it appears a normal negative without any mask, but with strong colour, I would suggest you could do it, you just would need to sandwich a piece of bleach and fixed C41 film against it (or unexposed, developed, bleached and fixed C41 film) to add with the mask.. or put it in front of the backlight. That'd be a start.