I have not tried chiascuro in waterclours either, but boy isn't Uschi's candle painting just beautiful..
When I looked at your rerf pic, I immediately thought of grisaille. Someone here did a terrific wip in wc on grisaille pears. http://www.wetcanvas.com/forums/show...4&page=1&pp=40
I really do love your ref pic, those yellows are just delicious, the reflections on the coffee pot wonderful..
Really looking forward to seeing your painting..