The Firehouse just acquired these great curtains, so now we can paint nudes if we want to. Considering that is the first one I paint in more than a year, I have two things to say: It is possible to see the gradations of the flesh tones at night, even with incandescent light. Your eyes eventually get used to this over a period of months. Also, using gel helps you control opacity. This makes it easier to depict flesh with acrylic. Lately, I've been experimenting with applying layers of opposite values with a paint knife, then scraping through them or blending them to form various grays. To see what this looks like, look at the wall.