walkeroftheocean said:
Just one more question - how do I get different breast sizes for the reference layer in the template?
Assets >> TemplateElements >> BodyElements >> BodyRightBreastTemplate
The timeline has six keyframes with tweens connecting them (150 frames in total). Copy-paste the BodyRightBreastTemplate and BodyLeftBreastTemplate onto your stage and fit your costume onto them at each keyframe, then tween up the costume pieces (straps? bra-cups? armor plates?) so that your costume fits around the breast shape at every frame.
Note that this technique is potentially quite difficult - it depends on the complexity of your costume and the number of pieces which must be reshaped to accommodate the breasts. It is not strictly
necessary to do the work that I mentioned above. Your mod can include a CharData string which explicitly sets the breast slider to a specific value. So you
could just choose your favourite breast size (or "the size which is most appropriate for your character"), draw clothing which fits, and ignore the other sizes. Many modders have released costumes which look great in their initial state but "break" as soon as the user adjusts the slider.
This technique is also not required if you're creating a new piercing -- they remain anchored to the nipple so you don't need to worry about breast shape. And if you're willing to use Loader mods then it's possible to create a sling-bikini which conforms to the body without dealing with any keyframes or tweens.
I'd recommend that you try something simple (e.g. a hat) for an initial modding project -- breast-adaptive torso costumes can be very frustrating.