Under painting can be done in many ways. I'm showing one of the most popular ways of completing the under painting. First I begin painting in a warm brown in our brown brands differ but you basically pick a warm brown such as Burnt Sienna, I begin painting by focusing on the darks or the shadows. The idea is to establish a warm undertone for my painting. I also keep it quite transparent and I vary the thickness of my paint, depending on the area where I'm painting, if I see that some areas need to be darker Use thicker paint and let's say if I paint on glass, I try to keep it transparent. At this step I never use linseed oil because I follow fat overlaying URL.

That means that there is no medium used in the first layers and then as you keep building up your painting, you start adding linseed oil to your pain. So to dilute this paint, I use a little bit of gamsol that makes the paint look more transparent and fluid.