Girls hanging upside down is one of my favorite bondage poses too. The big difficulty in Daz Studio is that most hair props will not comply to gravity.

For Rica I tried using a so called dforce hair for a long scene for the first time. For dforce hair one can simulate how it should fall for different positions.

The outcome is not perfect in every picture as you will see, but still generally satisfying I think.

The drawback with this hairprop is that it costs me at least an additional hour on average for each picture, to simulate the hair, counting all the false tries until it looks at least mostly right. So I definitely will not use dforce hair routinely yet.