Complex sentence: He is seated in the lotus position on a high pedestal at the center of the image, his hands in the "bhumisparsha mudra" while a jeweled canopy forms a nimbus around the length of his body.
Split into simpler sentences: He is seated in the lotus position on a high pedestal at the center of the image, his hands in the "bhumisparsha mudra". There is a jeweled canopy above him and a nimbus around the length of his body.