I use Marvelous Designer to make my outfits.
I am not, by any means, a traditional modeler, so "making them as props" doesn't really fit my workflow. My outfits (dynamic clothing) are themselves props. Can you make props that stick to other props? Does that even work? These are questions that I would need help with, to follow that approach. In the latest version of MD, the ability to have buttons was added, and I was overjoyed.... finally I could have that bit of detailing from the start. Unfortunately, it seems to still be a hit-or-miss thing on the export from MD, and in Poser, the buttons don't behave in a consistent manner.
The first (inner) uniform set, with the skirt, shirt and tie, had buttons that worked, in Poser. So, I was expecting the buttons on the jacket to work as well, but they haven't.

(I will try some experiments, and see if I can make the buttons as separate props....)

RosemaryR
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"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."