Stage 4; I've worked across the width of the grassy plain at the the back, gradually adjusting some of the colours as I've gone to reflect the change in the angle of the light source. At the left of the picture, where one is looking more towards the sun, the colour is dominated by cool greens caused by light shining through dew drops on the grass. As one moves right across the picture light is reflected less off the dew drops and reflects more of the true colour of the grass.