YW! If you use Daz, they are called D-Formers. In Poser, they're called magnets. Don't know if they still have them in the newer versions but they were great for morphing items to get a better fit or even changing a figure.
These images for example, I used D-Formers on the shirts to get a fit to cover their chest since there were no proper morphs in the shirts
Poison's breasts uses D-formers to get the squeeze under the shirt look.
Nice!!! Yes I use DAZ. So, I know of D-formers...never used them. Are they built in then or what? Great work on those characters! Poison looks amazing. I've been working on trying to do Chun-Li as well as Vega. I just can't find a mask for him. Thanks for the help.
They come with Daz and you add them to the character, clothing or object you want to deform. Just click on the item area and use the handles to change the mesh of the object. It takes some practice but I use them a lot. Most of the time to fix poke through and fit issues.
I did a Chun-Li image a while back. I had posted it but deleted it for some reason. I don't remember it being that awful....