99 deviants said
It varies, depending on the drawing.
72 deviants said
No, I (usually) don't, or I use only a very rough level of detail.
58 deviants said
Yes, I (almost) always refine those parts with a level of detail similar to the actual visible parts.
13 deviants said
I don't draw digitally/at all/I use only one layer, or I don't add background scenes to my work.