Rasa (aesthetics) denotes an essential mental state and is the dominant emotional theme of a work of art or the primary feeling that is evoked in the person that views, reads or hears such a work. According to Indian culture rasa is fundamental to many forms of Indian art including dance, music, musical theater, cinema and literature. There are 9 rasa known as 'Navras' in the Indian culture. Those are Love, Laughter, Anger, Compassion, Disgust, Horror, Heroic mood, Wonder and Peace.
In the illustrations shown here, Anger and Peace are executed with the central theme of Lord Shiv.
I am working on remaining 7 rasa. I will publish them soon.