As per previous posts, I’m working on some paintings based on my reference photos and sketches from Rocky Mountain National Park. I hope these are helpful. I should probably take more photos in between stages, but here’s at least three.
Here’s the drawing. I focus on general shapes and identify the darkest area of the painting. For these underpainting darks, I mix Sap Green and Alizarin Crimson until I get a neutral between the two, then I mix a little “California Blue” (a custom mixture of Phalo Blue and Garbazole Violet, a wonderful really dark blue when Ultramarine is not dark enough…BTW, I got this mixture from Brigitte Curt, who in turn got it from Ovanes Berberian).
Here’s the underpainting. I use a medium (again Ovanes Berberian‘s, 40% linseed oil and remaining Damar Varnish and Gum Turpentine). I focus on bright color underpainting, varying warm and cool. I don’t focus on values, which is difficult to do.