I do full body morphs, I use some sliders to get the general shape of the body and then do the rest in blender. But my body shapes are slightly smaller than base genesis 8 and the size of breasts would make most assets unusable or at least look really bad. Especially the under-boob, because how clothing wraps around the breasts and such.
This and my obsession with the bust made me develop my whole system of how to do things.
Example I had to make bunch of custom morphs for breast movements, fixing leg spreads because of thick thighs and such, which work generally well with most of my body shapes, but require some understanding.
View attachment 2029139
View attachment 2029140
This allows me to do renders like these:
Then there are the clothing fixes. These I have to do for all the body morphs individually. I made a guide for this as it works for any big boobs.
https://f95zone.to/threads/creating-universal-adjust-morph-for-big-breasts.112206/ It's quite outdated and I improved the whole process quite a bit, but I'm too lazy to remake the guide. Maybe when I'm making a new one for next body in the future.
This allows me to use clothing, because the assets you can buy for it are just too general and won't do anything for boobs this size and this specific geometry (the under-boob especially).