When I was making my woodcuts, I looked to Max Ernst for ideas on detail.  His woodcuts are beyond impressive!  I love the detail he manages to bring to his images.  I enjoy how graphic and awe inspiring they are from a distance, yet upon closer examination it's just many lines carved together.  Max pushed me to bring more detail to my woodcuts as well as give me ideas on the folds in peoples clothes and light and shadows.  He has a great book in the library called "Une SemaineDe Bonte".  He incorporates animals for symbolic effect, which I also like to do.