In this etching, Goya uses light to put emphasis on the half woman, half chicken to grab the viewers attention. This is so the viewer can get a sense of how all of the half man, half bird creatures are attracted to that creature.
The light also has an emphasis on the old lady to show the ironic pose that she has.
Also, there is an focus of light on the breast of the woman-bird creature and the one of the two girls gutting the man-bird. This is to show that the reasoning of the man-bird being captured is because of the woman's physical appearance, indicating that they are falling to lust.
The imagined figure is a street lamp. shining bright, with a surrounding fog in the dead of night.
In order to bring life to this from a dark area, I would first lightly erases a few lines to indicate where the street lamp is due to the light from the lamp it self.
Burnishing would be necessary over the bottom half of the lamp, to give a fog effect to both the visible part of the lamp and the light shining from the lamp.
Since the scene is at night, extensive erasing would be used to show how bright the light shines towards the top of the lamp. Burnishing would the be used again to show how the light hit and reflects of off the fog.
Lastly, crosshatching would be used to show the darkness of the base and one of the sides of the lamp to give a sense of depth to the pole as well as a supportive indication as to where the light is not hitting the pole of the street lamp.
