I am just now discovering the Ocean of Compassion with the Red Buddha, making love with his girlfriend. In the original picture, we see a great deal more detail, along with many more Buddhas inside of bubbles, plus clouds and water and mountains in the sky.
Brahma is the Hindu god of Beginnings. I equate him with Sir Paul McCartney! Perhaps his three heads symbolize his willingness to integrate Past, Present, and Future. His 4 arms could symbolize the 4 elements, and they each hold a power object, including Mala beads.