Haven't done one myself yet, but I read through the guide and some troubles others had. Assuming you already have a model it mostly depends on how it was rigged etc. whether it's useable as is or if it needs to be redone. Then you'll need to do a bit of stuff for boob growth, stomach deformation and fat pillows on the model.
The guide can be found here (
You must be registered to see the links
) and is relatively indepth. But it requires you to know how to use Unity and Blender a bit (basic knowledge should suffice from what I can tell). Their discord seems to be helpful too for problems and/or testing.
