I made this etude in alla prima technique, using thin soft brushes. For form modelling, I used white color of canvas in the overtones, clean open cadmium red on lights and middle tones, and carmine in the shadows. I drew reflex to achieve more volume form. I tried to detail my painting as well, but in the same time give it some freshness, the impression of first glance. Also, I didn't use deep dark colors, even in the shadows, to show the sunlight and air in the picture.