Might as well show another demo. Here is a one shot n18 by 24. I painted this one with a huge cheapo brush from Michaels. As you can see above, I ghosted the image in very lightly to get my design. I wiped it out once already after about ten minutes of work, this is my second try.
I used burnt sienna and chromium oxide green to lay in the grass and the left hand reflection. Their is a little ocher in the babk at the left. This is all transparent, I don't want to touch the white too soon in the process.
I faked the sky, there was just too much empty blue up there. I felt I needed something going on rather than leaving so much of the canvas "undecorated". The clouds are ivory black, white, and a little cadmium yellow in the lights. I sketched them in first with white polluted with the sienna and chromium oxide green so the would have the same color cast as the rest of the painting. Then I painted the sky, cutting them in with cobalt blue and white. Then I dabbed some white and burnt sienna into the blues to vary them and cut the chroma.
Above is the painting as it looked when I quit for lunch. I will fool with this one just a little bit in the studio when I get home.
Here I am, painting the Rio Grande in 102 degree weather.