I run into this sometimes myself. This is usually caused with colidable clothing when using Breastacular, because the nipple morphs are on the Brestacular Graft itself, and the clothing item is trying to collide with the base G8F figure breasts, which probably won't have nipples turned on when using Breastacular. It's the same when trying to collide pants with Dicktator/Futalicious, an object can only collide with 1 other object at a time, and Studio considers grafts to be a separate object from the parent object.
Due to this, Breastacular is really intended to be displayed nude, however there IS a workaround that I use. ;)
Try the following:
- Save a shaping preset just for the Breastacular object so you can undo this later!
- Zero the nipple shapes on the breastacular graft, any Breastacular shapes attached to the base figure can be left on.
- If you want nipple bumps on the clothing, crank up the nipple morphs on the base figure, most importantly "Nipple Scale" or "Nipple Size", this will provide nice round shapes for the clothing to collide with for a nice nipply look :D .
- Once you are done rendering with clothing on the figure and want to go to a nude figure, zero the base figure nipple morphs, and apply the shaping preset you saved on the Breastacular object, and you'll have your detailed Breastacular nude nipples again! ;)
There are other (more complicated) ways to work around it, but I find this is the fastest solution. :)