The way to minimize problems, is first, determine what problems need to be minimized.
If weight is a minor problem, then photograph from angles that allow the weight to go away from the lens.
If stretch marks are a problem, then allow them to be concealed or toned down with shadow, garment or fabric drapings, etc.
If she has a smaller bust, then use a more side angle, which can make the bust appear larger, and so-on.
It's really just looking for the best features, enhancing those, and minimizing those that are less attractive.
Remember to "stretch out" the body, to make the body appear leaner and slimmer, including having her use her muscles to accomplish that.
Just apply all the basic principles of portraiture, but as they apply to the entire body, and not just the face.
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