Drape parts of their body with material or obstruct them with furniture, grass, trees, lamps, candles, curtains, etc., placed on the foreground, making sure you can still see some curves, like playing a “peekaboo”.
Using material – silk, tulle, satin can be a great help as you can show only the bits you want to show and hide the bits you want to hide.
For example – somebody with wider hips:
if you place material strategically on them if they are sitting or standing or in front of them if they are lying down – you can still show a bit of their hip, but still hide the bulk of it.