My approach to glass and ceramics is to pay close attention to highlights and refections. I also wanted to capture the difference in texture between the velvet lining and the glass of the eye. I painted the box with watercolors, using ochre and grey with a little bit of white gouache, then let it dry, and did the eyeball all in gouache. Oh, and I didn’t do any actual drawing, just used two sable brushes, #7 & 4.
Here’s looking at you, kid.