en marbre polychrome : Of many-coloured marble

57.4. dans une lumière ... et de trompe-l'œil : ' Lighted from behind and looking as life-like as can be.' ' Une lumière de transparent ' is the light from behind that shows up a picture or an inscription painted on some thin fabric like canvas or muslin. ' Trompe-l'œil ' is a vivid efïect obtained by exaggerating the light and shade in a picture.