This model is mainly focused on making ruched, tight-fitting bodycon dresses. It is based on 27 images that are mostly fashion store listings.

Usage
dsruched, dress is the bare minimum required to see this model in action.

I have tagged other aspects of the dresses in the images I used. Other tags I can think to use off the top of my head are:

mini dress (this is the most common style)
maxi dress (hit or miss due to only getting 2 or 3 sample images)
spaghetti straps
v neckline
straight neckline

Known Issues
Because this model is based on store listings, the poses it generates might be limited. Faces and bodies will also be skewed toward "models." I recommend using ADetailer to fix faces in the generations.

The effect shows up much better in realistic or semi-realistic models. While it does work on anime/cartoon models, the ruches will be drawn mostly as lines across the dress, without affecting the shape of the waist outline.