Some time ago I wanted to compare the relative yellowness of various oils. Additionally, I duplicated the comparison so as to keep one in sunlight, the other darkened. While building these samples I really didn't pay attention to the thickness of applied oils, making my test a bit skewed. But, the difference between light and dark is more significant than I would have imagined.
After a good start over a week ago, I'd slipped away from my brushes. At this point I'm simply blocking in with minimal form and detail.