Same anon as
>>5754357I did a quick sketch of some of the underlying structures as well as a chart on how you can use hip dips to find out where the pelvis is. Similarly, deltoids, trap's and the clavicles can help you find the top of the ribcage. Sorry that it's a bit sloppy, I really need to get better at markmaking on a tablet.
The pelvis can easily be simplified as a box and ribcage as this spherical form with an arch in front. Bear in mind that the 10th rib (the lowest one that protrudes in the front) is actually followed by two false ribs. Also I forgot to draw the scapulae but you can easily see one where her skin stretches right of the ribcage.
Again, Vilppu is the way to go.
