It's not late, this is a slow process because I'm bad at focusing on it.
If you mean real life examples I've been using bodybuilders and fitness women and it works decent enough. The ideal are proper poses in black and white with good lighting and that's what people pay for (or pirate) but it just isn't there for female musculature.
The biggest problem I'm running in to is finding the right balance for a "passive" fantasy muscle appearance without making one of those 2% bodyfat extreme bodybuilders that look alien. Abs are simple and people have grown to expect to see them in their active state even when someone is sleeping, but for other parts like limbs and back it's a lot more complicated with the shape varying wildly with activity. I've noticed that the quads in the legs are especially a nightmare as they have a bunch of overlaying muscles that can really alter the shape of the leg in basic movement.
In 2D you can draw the proper muscles flexing per pose, but no one, not even studios with billions of dollars, animate muscles actually flexing and stretching in 3D (and rarely in 2D). I'm also trying to make this a body can turn into a regular "anime" appearance of low detail, which is easy, but also a plump body, which is actually more difficult than you'd think.
I think I'm going to try experimenting with morphs/shapes that trigger on animation, but it will be a lot of work and I doubt it'd work with physics. Pic is just a 3D butt without any color, but I'll spoiler to protect the virgin /qa/ eyes anyway.