I wonder if maybe there should be a section of the OP that addresses this question, it seems to come up a lot...
still enjoy this branch of the game, but I'm wondering if it's possible to develop a few new clothing options after all this time and also take tits to an even greater size extreme? Are those things even a possibility?
The way the graphics work in the game, the only way to add a new item of clothing would be to render out a separate image for every pose, in every body size. The original developer really shot themselves in the foot, by doing the graphics in such a way that it was actually extremely tedious and difficult to make, but gives the illusion of a live 3D game where you can drop in a new mesh and it automatically works at every angle and size.
Every single thing you see in the game is a two-dimensional image. There are no 3D elements. Everything that looks 3D was made in a 3D rendering program and then exported out one-by-one into flat image files.
I think the most practical way to add a little more variety to the clothes in the game would be to just modify items that already exists (in a graphics editing program, not a 3D renderer). For instance, take the lace sweater and delete the sleeves from it. It would still be a pretty extensive chore to find every image of the lace sweater, make copies of them (and rename those copies into the proper format), then go through each one and erase the parts of the image where the sleeves are. But it's a realistically achievable level of impracticality, whereas recreating all the models or lighting or whatever else in Blender or Daz that was necessary to make the original clothing images might not be feasible at all. And even if that's achieved, you're still left with just as much of a tedious, extensive chore as the first thing I said.