I asked this question at daz when I was wondering why my hair went all "bendy" at a certain point. On one render, it turned out to be the eyelash lengh, but I think something else because it stayed a little bent, but I could live with the render at that point. However, i have noticed it happening a lot, and wondering what else I can check. One of the renders looks like this(see by her eyes how the strand has a sharp angle? and the second has a bend in her right ponytail?)