This painting of two labradors sitting on the steps in dappled sunlight took 4 attempts to get right, the first 3 were wipers. I was almost ready to give up. Decided on one last attempt because I really did like the dogs.
The reason for the decision was a clue.
I had been blocking in the whole piece. On the 4th attempt, I painted the dogs only to completion, wiping the board as clean as possible, sketching in a few lines to get the positioning right and laying out a small palette of colours for the dogs only.
On the left of the palette I laid out shadow colours: raw umber, french ochre, black and white. On the right, I laid out the sunlit colours: transparent oxide red, yellow ochre deep, cadmium yellow lemon and white. I used two brushes, one for shadow and one for the light.
This approach did the trick - I finished up with two labs floating near the upper quartile of the canvas, but they were just as they should be. Then I put in the background around them with a fresh palette of colour, but again, divided in half: the shadow colours and the light colours.
These were: raw umber, purple lake and ultramarine - shadow; yellow ochre deep, naples yellow, lemon yellow and white - sunlight. For the bushes, I added cadmium green light for the sunlit areas.
Two brushes: one for shadow, one for light.
Hope you like the result.