By Carrie Lewis in Art Tutorials > Painting Tutorials Many so-called “rules” of art are more suggestions than rules. It’s helpful to know what they are, but you don’t have to follow them rigorously to make great art. However—when it comes to oil painting, there are three rules that you absolutely, positively MUST understand and follow if you paint in layers, or your work will fail every time. They are: Fat over lean Thick over thin Slow drying over fast drying Why […]